Tim Huffam

Dotting the I and crossing the T of I.T.

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I got this error immediately after installing VS2005 & SQL Server 2005 Express and trying to establish my first connection using the new server - not a good start at all - and by the looks of it, it's happened to many hundreds, if not thousands, of others too.

Generally this error occurs if you cannot connect to the SQL server - as the message says (no sh*t).  However, what's not obvious is why...

First suggestion is to make sure that you specifiy the instance name as well as the server name (christ knows why, but when MS refer to "Server Name" they really mean "Server Instance Name") eg if your server was named 'bigturnip' then you need to specify 'bigturnip\sqlexpress' (where sqlexpress is the instance name - this one just happens to be the default used by SQL Server 2005 SQLExpress).

If that doesn't help, then go into the SQL Server Configuration Manager and make sure you've enabled Named Pipes & TCP (if you're using it) and also go into the Surface Area Configuration tool and make sure you've set it for local &/or remote connection for the connection types you want to use.  Then restart the SQL Server (instance) service.

HTH

Tim

 

posted on Monday, January 30, 2006 12:32 PM

Feedback

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/12/2006 12:17 PM C Grainger
Tim, thanks so much for posting this. Specifying the instance name hit the spot first time.
Much obliged..cg

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/15/2006 4:06 AM Matt
Holy crap. I cannot believe how much time I've spent on this and nobody else every mentioned machine/instance. Fixed it straight away. Thanks

# SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/20/2006 6:28 AM Arun
Iam getting the same kind of an error, but the thing is i don have MS SQL 2005, i only have MS SQL Server 2000. I use Dot Net framework 2.0. The error is like
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

Could u please tell me how to correct this.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/1/2006 3:11 PM mc
Damn I wasted like an hour trying to figure this out!! Thanks for the post =P They need to add (MachineName\Instance) after "Server name:" on they add connection window!!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/3/2006 12:29 AM CheezNCrackers
Thanks. Very much appreciated.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/3/2006 9:33 PM Robert
I'm running XP Pro with SQL 2005 Express. I installed using the default option insted of a named instance. I've tried different combinations:
machinename\instance = Pluto\default

and it's not working.

Any advice?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/5/2006 5:58 AM Tim
Robert - SQL 2005 always uses an instance (ie so does the default install) - so you'll still need to specify the instance name - as in the example I posted.
HTH
Tim

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/5/2006 6:05 AM Tim
Arun - sorry mate - not sure about that as I've not tried it. However, at a guess the problem is with driver/provider... my guess is that it requires an instance name (yes sql2000 does actually use instances as well) - so go look in Enterprise Manager to see what the instance name is - from memory it's the name of the server in brackets beneath the SQL Server Group node - ie (local) - so try adding "\local" to your db name in the connection string.
hth
t

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/8/2006 11:20 AM SR
Ur idea is realy thankfull,Before i tried a lot with many options but some error i would got ... now after reading ur solution i tried with \sqlexpress in small letters instead of \SQLEXRESS it worked out... My problem got solved . Thanks a lot once agian

# An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. 3/26/2006 5:04 PM Jess Coburn's Blog
The full error is:
An error has occurred while establishing a connection to the server.  When connecting...

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/28/2006 2:27 PM Sumant
Man.. you are great!!! the server instance name thing worked for me

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/29/2006 3:41 PM anand
The server instance name did it for me...thanks so much for the post.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/30/2006 8:23 PM kevinus
You are the man

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/5/2006 3:55 PM Jimbo
You've just saved me from a few more hours grief - top work.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/7/2006 12:38 PM Jorge
Thanks so much Tim, this solved my problem and saved me many hours.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/9/2006 6:34 PM Willian Lopes
Tim;

Thanks, thanks, thanks, thanks and... thanks again!

I'm fighting with this problem already have 4 days with no solution!

Now I have a solution

Thanks again!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/10/2006 9:19 AM Anthony
Thanks - Wasted half a bloody day already !

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/10/2006 9:09 PM yue
Tim:

Thank you so much!!!! I have wasted so many hours on this already and finally it worked and finally I can move on. I am so happy!!!! =D

Thanks again!


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/21/2006 1:01 PM Dirk
Hi Tim!

It seems that you made have a million developers happy (me included!). I nearly threw my PC against the wall because it just didn't work. After I found your posting my life felt a lot better!

Many thanks and all the best for you!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/22/2006 4:31 AM smlfish
Many thanks, man!:)

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/22/2006 5:04 PM chelvy
Hi,

I am still getting the error. Below is my connection query- Simple test query. And i checked the surface area config the tcp/ip and namedpipes are selected.

When i use the database connection tools and work with the data set it works.

Please help me. Tx

string connString = "server=SAM/Sam<semicoln>" +
"uid=userSQL405<semicoln>pwd=1Qazxcvb<semicoln>" +
"database=dbVS405"<semicoln>
//string connString = "server=(local)<semicoln>Trusted_Connection=yes<semicoln>database=dbVS405"<semicoln>
string selection = "select * from tblEmployees where empid ='002'"<semicoln>
SqlConnection sc = new SqlConnection(connString)<semicoln> // get ready to connect
sc.Open()<semicoln> // connect
SqlCommand cmd = new SqlCommand(selection, sc)<semicoln> // get ready to read
SqlDataReader sdr = cmd.ExecuteReader()<semicoln> // really get ready!
while (sdr.Read()) // read at last
{
listBox1.Items.Add(sdr["empid"].ToString())<semicoln>
listBox1.Items.Add(sdr["firstname"].ToString())<semicoln>
listBox1.Items.Add(sdr["lastname"].ToString())<semicoln>
listBox1.Items.Add("")<semicoln>
//listBox1.Items.Add(sdr.GetString(0)); // empid
}
sdr.Close()<semicoln>
sc.Close()<semicoln>
}
catch (Exception ex)
{
listBox1.Items.Add(ex.Message)<semicoln>
}


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/27/2006 6:37 PM Rogerio Senna
Thanx Jim, I was also loosing my time in a not so smart way... :-)

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/29/2006 9:01 AM azhar samdani
Hi,

I had a similar problem. My website was on the local machine too. It was not a fault with "Remote connections" at all!
Actually, I was typing (local)/sqlexpress instead of <b>(local)\sqlexpress</b> ... (<b>use backslash</b> instead of forward slash)!!
Phew! Sometimes the smallest of things can frustrate you!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/1/2006 11:40 AM JC
One and a half days working with error 40 in SQL Server 2005, 1000+ pages searched and read on google, 3 books, believe it or not-from MS Press!!--way to go Microsoft-nothing like incompetent documentation of their own products.

Thanks for having the foresight to post this on the web. Kudos man!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/2/2006 8:25 AM Tim
machinename\sqlexpress worked for me...other similar combinations kept bombing, including localhost\sqlexpress...

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/4/2006 10:34 AM Kiran Bagga
Most websites dealing with connecting to MS SQL DB using ASP.NET & ADO.NET suggest localhost. Replacing this with server\instance worked for me. Thanks!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/7/2006 2:18 AM Jinn
My computer can connect remote SQL Server 2005. But others doesn't. Why?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/10/2006 11:18 AM umesh
My Machine name is "TASPWEB" and i am accessing Northwind database.
what will be my connection string in vb.net
"Data source = TASPWEB;Initial Catalog= Northwind;user id = sa;password=sa"

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/10/2006 12:45 PM Rohit
Hi, I tried this but didnt work at all. My SQL SERVER 2005 instance was running properly till yesterday. I installed IE 7 today and after installing IE7 i cud not connect to SQL SERVER 2005 and its showing the message :

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)



Please helpppppp

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/10/2006 6:27 PM Nisar
thank you very much!!!!!!!!!!!!!!!!!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/11/2006 5:20 AM umesh
what will be the connection string if my machine name is "mac" and server name is "DBserver" and database is "empdb"

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/12/2006 3:51 AM santhosh.k
If u get this provider:named pipe provider ble bla.... first u need to check ur connection string. if the connection string is correct and then aslo u r getting this error then in configuration manager u enable tcpip and remoting protocol...

Happy coding !!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/17/2006 2:52 AM Nick Hoggard
Good stuff!!

Back slash ... Forward slash ... who would have thought there would be such a difference!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/17/2006 7:12 AM crabback
Amazing! Just been trying to figure out this problem for the last hour. 2 seconds on this page fixed my app!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/30/2006 8:15 AM Bala
Nothing worked for me..
Still getting the error..

#  SQL Server 2005 SQLExpress advanced 6/8/2006 7:14 PM Clockwise
I use php 5 and i'm trying tp connect to sqlexpress 2005 with this connection string
$msconnect=mssql_connect("COMPUTER_NAME\SERVER_INSTANCE_NAME","USERNAME","PASS");
I get the error "Unable to connect to localhost"..I NEED HELP!!!!!!!!!!!1

#  SQL Server 2005 SQLExpress advanced 6/8/2006 7:17 PM Clockwise
I use php 5 and i'm trying tp connect to sqlexpress 2005 with this connection string
$msconnect=mssql_connect("COMPUTER_NAME\SERVER_INSTANCE_NAME","USERNAME","PASS");
I get the error "Unable to connect to localhost"..I NEED HELP!!!!!!!!!!!1

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/13/2006 3:04 PM silas
hello

i tried "osql -E -Q "SELECT * FROM ..." and i get the error "Named Pipes Provider..." how can i fix it?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/15/2006 1:02 PM JoeLeTaxi
SQL2000/VS2005/db name is DVS/Working connstring is - connectionString="Data Source=*;Initial Catalog=DVS;Persist Security Info=True;User ID=*;Password=*"/ The Server Group Name is (local)(Windows NT)

If I add local\ or Windows NT\ to the Catalog name the connection wont even test OK, but just DVS works from my machine - the server is remote to me (the other side of the office on another machine!).
Now, when I promote my website to our webserver in the configuration that works on my machine - thats when I get the "provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server" error. The server is remote to our webserver as well - weird or what??

Anyone got a clue about this

Cheers for reading this far

Dave

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/15/2006 1:05 PM JoeLeTaxi
Sorry - forgot to say - I have switched on Named Pipes and TCPIP

Cheers

Dave

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/15/2006 1:15 PM Tim
Dave, the catalog is the db name (not the server name). Data Source is the server and instance (if you have a named instance configured). If no instance name is configured just the name of the server (name of the machine running the sql server process) will suffice. If an instance is configured then you'll need to "\instance" to the server name (where instance is the instance name). eg:

Without a named instance:

Data Source=myserver;Initial Catalog=mydb;Integrated Security=true;Connection Timeout=1;

With a named instance:

Data Source=myserver\myinstance;Initial Catalog=mydb;Integrated Security=true;Connection Timeout=1;


hth
Tim

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/15/2006 1:21 PM JoeLeTaxi
I'm being totally thick here!! (no change there then!!)
How do I know if there is a named instance or not?
Cheers
Dave

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/15/2006 1:35 PM Tim
Probably the easiest way is to start up Enterprise Manager (either on your machine or on the db server itself).

If you can see the db listed in Enterprise Manager then it's instance will be listed.
eg if your db server has no instance it will say something like:
MYSERVER (Windows NT)
If it does have an instance then it will looks like this:
MYSERVER\THEINSTANCE (Windows NT)

In both cases ignore the (Windows NT) - ie just use the word after the server icon.

User this in your connection string.

hth
Tim

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/16/2006 5:24 AM JoeLeTaxi
Thanks Tim - OK, On the server, it has a name of (ignore the quotes) "(local)(Windows NT)", and on my machine it has a name of "nnn.nnn.nnn.nnn(Windows NT)", so I would assume that there is no instance - true?
Beneath each of them is the normal structure of Databases, DTS, Management etc etc, and within the Databases are (strangely) all the databases that I use. Right - that sets the scene properly!!
So, any idea why I'm still getting the error?
I can feel it in my water that its going to be something stupid, but at the moment I cant see it - help please - sorry to take up so much of your time
Cheers
Dave

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/16/2006 7:41 AM Tim
On the server it says 'local' because the db server is one the same machine as the instance of enterprise manager.
However from your machine it's using the ip address of the server (nnn.nnn.nnn.nnn) as it's not 'local' (ie it's not on your desktop).

So, to be safe always use the ip address - then your config file will work both when running on your pc and on the server.

eg:
connectionString="Data Source=nnn.nnn.nnn.nnn;Initial Catalog=DVS;Persist Security Info=True;User ID=*;Password=*"

FYI: you can use either the db server's ip address or it's machine name (which will resolve to an ip address internally).

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/16/2006 7:57 AM JoeLeTaxi
Tim....
You are a star - it works - thanks for all the help.
Cheers
Dave
PS up and working bright and early this morning are'nt you!!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/23/2006 3:00 PM Manish
Help me i am having trouble with user name and password what should i do

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/6/2006 9:29 AM Taco Oosterkamp
Thank you!

SQL Server is so much more picky than Interbase when setting up databases. And the obscure error messages don't help.

But a post like yours does! Chapeau.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/14/2006 7:35 AM Brian
Oh boy!
Thnx to google for getting me to this page. I got nothing from MSDN forums regarding this very problem.

I am new to this, and istalled Vis Stud EE 2005 from a free disk on a UK mag. My problems start when I try to connect to a db using "Add Connection" dialog.

The Data source type specified in the tutorial is MS SQL server, Data Provider is .NET Framework Data Provider for SQL server...

I used the "Refresh" button next the Server Name textbox and get ATHLON2100\SQLEXPRESS as the server name.

Unfortunately, I still get the Error 40 "Named Pipes" message we are all talking about.

I've checked the config' manager but I can't find any reference to TCP/IP and remote access mentioned in some of the other responses. Except that TCP/IP is enabled as shown in "Protocols for SQLEXPRESS" and "Client Protocols"

I would really value some help with this!
Also, in an attempt to get an interface for SQL server, I downloaded and installed "Server Management Studio Express" from MS. This has a better interface, but I to scared to make any changes that I don't understand.

ps. This site goes straight into my Favourites, on top of MSDN forums.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/20/2006 10:36 AM Dim)on
Thanks from Ukraine:) That was very helpful...

??????? ??????? =?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/26/2006 7:20 PM Jonathan Barton
Well bugger me, of course it was the instance name ........ now how come it took me 3 hours banging me head against the desk, and then 1 minute on google to find your suggestion, then oh look it works.

Thank you so much, add my name to the long list of "I'll buy you a pint" programmers.

Cheers from Derby,UK.

Jonathan

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/16/2006 2:20 PM Steven Wilber
Thanks - saved me hours of hair pulling. I saw the error message and just groaned - I know that it was going to be one of those long trawl problems - but no, with your help all sorted very quickly. Thanks

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/18/2006 11:22 AM Junior Osei-Agyemang
Damn, spent 3 months with every possible combination of trial and errors. None worked. MS can sometimes be cruel. Thanks a lot Tim.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/25/2006 3:35 PM Rudi
In order of priority you rule over MS and Google!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/25/2006 10:41 PM humbled in chicago
You are now like a god to me. I am bowing to you ... tomorrow I will sacrifice a goat in your name.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/7/2006 2:56 AM Sumit Bajaj
I usually gets the same error but as i restart the machine it starts working.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/8/2006 12:39 PM Christian Sollfrank
hello :-)

I want to connect from VS 2005 to a ms sql express server on a remote machine via .NET Framework-Data Provider for SQL Server.
I really tried anything you can imagine, just the server's name (name of the pc in network) in lowercase and uppercase letters and in any combination with the instance-name (shown for example when i have logged in to use MS SQL Server Management Studio Express: "<PC-NAME>\SQLEXPRESS") and in any combination with backslash and forward slash. i allowed remote-connections, mixed authentication, tcp/ip- and named-pipes-connections AND RESTARTED THE SQL SERVER. i can logon local with the same user and the same password and i really have ALL PRIVILEGS on all database objects. any solution i found until now didn't work - please help me, i'm really desperate ;-(

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/15/2006 10:02 AM Karthikeyan
Hi,
I got the following error while trying to un install my product. Can anybody help me to eliminate this error ....?


SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/19/2006 8:23 AM 0号博士
1 connection ??: example :
connectionString=@"Data Source=*;Initial Catalog=DVS;Persist Security Info=True;User ID=*;Password=*"/

2 ???????, ???????,?,??????
try

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/19/2006 8:27 AM lhbsh
my god it is Support Chinese

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/19/2006 8:28 AM lhbsh
Take a look your fire wall or connectionstring add @

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/20/2006 2:33 PM Stan Vickers
Wow - Thanks - adding "\sqlexpress" did the trick. Thanks for helping me find that needle in the haystack! As with others you have saved me a bunch of hours.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/22/2006 1:07 AM SM
Adding \sqlexpress worked for me

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/27/2006 6:47 AM danny
thanks :) , this fixed my problem.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/7/2006 12:36 AM Michael
Million thanks for your posting. You saved
my day with the \sqlexpress

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/11/2006 1:00 AM Manal Helal
Thank you so much for this great posting, I won't claim I searched too much or read too much, I was lucky to find this post straight away,

thank you Tim,

Manal

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/12/2006 5:09 PM Stewie
Way to go Timmy
The World is mine!!!!!!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/13/2006 2:40 PM Emil Gottwald
I'd like to add my thanks to all the others. I was tearing my hair out following all the various troubleshooting procedures when I cam eacross your suggestion to name the instance. Presto! problem fixed...

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 11/1/2006 11:07 PM Brad morrison
typeing in server\sqlexpress wasn't enough for me. I had to enable all four protocols: Shared memory, via, tcp/ip, named pipes, and then it worked. I think it was the shared memory that did the trick.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 11/8/2006 4:29 PM firedog
all you need is:

CONN_STRING = "Server=.\\SQLEXPRESS;Initial Catalog=master;Integrated Security=SSPI";

NOTE: write server name with TWO left slashes ( .\\ SQLEXPRESS ) !!!

You must allow Remote Connections too:

Start->Programs->Sql Server 2005->Configuration Tools->SQL Server Surface Area Configuration. Click "Surface Area Configuration for Services and Connections". Choose "Database Engine->Remote Connections", select "Local and Remote Connections", Apply, OK



# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 11/22/2006 3:26 AM Deepak Artal
For me I got the same error because the SQL Serve instance was stopped. I just had to SQL Server Config Manager and start the server and it solve the problem.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 11/27/2006 3:39 PM Keu
This ate up my entire day of searching for solutions!! The <machinename>\sqlexpress worked for me!

You would think Microsoft will be smart enough to either put in a more descriptive error message or even put more helpful information in their website. Tsk tsk.

Glad we have someone like you, Tim!

Thanks!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 11/29/2006 1:48 AM Josue
Thanks man, you saved a bro's *ss i has like 20 minutes trying to connect to sqlexpress and loving sql2000

:)

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/5/2006 7:18 PM aa

THank you for the help!

the name of the server must be same as the 'server name' that appears in the first popup when you open the MS SQL server.
the following connection string worked for me:
"Trusted_Connection=yes;server=yourLAPTOP\SQLEXPRESS;database=your_database";



# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/7/2006 5:25 PM sina
thanx firedog

u saved my time god save yours

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/13/2006 4:28 AM CarlosG
i have the same problem when try to connect from windows 98 to sqlserver2000(windows xp no sp2) my application was developed in vb2005, the first problem was "cannot generate SSPI context", i solve this erased the trusted connection = SSPI, but now have the "error 40 could not open connection to sql Server", i read the back post and i tried the solutions but anything works

please help me....
Server=xtreme;Database=AX;Trusted_Connection=false; not work

Server=nnn.nnn.nnn.nnn;Database=AX;Trusted_Connection=false; not work

thanks


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/22/2006 9:17 AM Alok Sen
Amazing forum..
Thanks all of you.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/22/2006 12:19 PM RUkshan
How Can i connect to sql server on another machine which connect through a router ?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/30/2006 9:47 PM DT
Thanks. You just dug me out of a hole that I have spent the last two hours in

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/31/2006 2:33 AM Zoot
I've been at this all day and still "no worky". I've got everything enabled that could possibly be enabled. Here's the connectionStrings I'm playing with. See anything I should change?

<add name="LocalSqlServer" connectionString="data source=BART;Integrated Security=SSPI;Initial Catalog=ASPNETDB.MDF;User ID=admin;Password=password;User Instance=true" providerName="System.Data.SqlClient" />


<add name="LocalSqlServer" connectionString="data source=BART;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;Connect Timeout=20;User Instance=true" providerName="System.Data.SqlClient" />

Please tell me there's something I overlooked in the strings!



# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 1/5/2007 7:07 PM Zkario
Great Solution, simple and short! good job.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 1/16/2007 5:23 PM Kiley S.
Thank you, thank you, thank you. I had the exact problem described at the top of this doc. By changing the server name the connection worked. Boo to Ms and Yeah to you!
Kiley

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/14/2007 10:31 AM Wizard!
I tried everything mentioned above, however I still get the same error...

I tried with xxx.xxx.xxx.xxx, xxx.xxx.xxx.xxx\SQLEXPRESS, name, name\SQLEXPRESS.

I tried with ODBC Datasource, SQL Server (both OLEDB & SQL), SQL DB file.

I tried with Windows authentication & SQL server authentication

I Tried with/without Firewall

Simply, it does not work for me. Always the same error...

I have enabled remote connections for both tcp/ip and named pipes and restarted the server, I even restarted the machine.

What am I doing wrong?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/19/2007 8:03 PM Dominic
thank you it worked when I tweaked the catalogue now I can do my college project in C# using SQL as my data source thanks Tim and Dave for presenting the Questions and Answers I needed! THANK YOU, God bless you

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/10/2007 1:39 AM php5 beginner
Warning: mssql_connect() [function.mssql-connect]: Unable to connect to server:

$db = "abc";
$mssql_access = mssql_connect("STAR\SQLEXPRESS", "sa", "abc123");
mssql_select_db($db, $mssql_access);

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/22/2007 9:05 AM r
DONT FORGET .\\

CONN_STRING = "Server=.\\SQLEXPRESS;Initial Catalog=master;Integrated Security=SSPI";



# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/25/2007 7:38 AM Jayaram
THANK S A LOT......... Same error.... what a way to start. Wish Microsoft were better with their tutorials. Anywayz, This site seems grt help. Its working now. THANKS A LOT TIM!!!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/8/2007 1:35 AM NAV
Hey As u have said i configured the instance and the server name, but its still the same.
Its giving the same error again...
And one more thing when i see the connection manager thats in the tray of the system...its also not connecting to itself locally but the server connects to others like sql 2000 server.
But not the 2005 server.
Please help me what shall i do?

Thanks in advance
Nav

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/9/2007 5:52 AM Wasif
If you are using SQL server 2000 and it is web application then add following tag in web.config under <system.web>
tag
<identity impersonate="true" userName="ABC\administrator" password="A*4B*5C*6"/>


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/16/2007 10:05 AM defmys
Thank you for providing this.
It works!
I've looked for it for a long time.
I quoted it in my blog with the URL.
Thanks.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/28/2007 12:03 AM Ben
Brilliant, I searched multiple web sites that claimed to solve this problem and this is the only one that worked.

Thanks
Tim

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/31/2007 5:46 AM sql n00b
THANK YOU SO MUCH!!!!!!! I WAS tearing my hair out over this.....ugh cant MS just make SQL EXP run like reg MSSQL...

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/13/2007 5:29 AM Dmitriy
Thank you for this topic.
I`m sorry, I do not understand some moments.
Where have I to specifiy the instance name?

I just installed Visual Studio and AJAX. When I try to use AJAX functionality I get the error message. I do not try to connect to MS SQL Server in my code.

I checked server properties using SQL Server Configuration Manager. They are the following
SQL Native Client Configuration -> Client Protocols -> Named Pipes: enabled, default pipe is "sql\query"

SQL Server 2005 Network Configuration -> Protocols for SQLEXPRESS -> Named Pipes
enabled, pipe name "\\.\pipe\MSSQL$SQLEXPRESS\sql\query"

What I shell change here?

Local and remote connections are permitted.


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/26/2007 2:09 PM berlin
make sure u have set the TCP/IP Port to 1433

SQL Configuration Manger ---> SQL Server 2005Network Configuration ---> Protocols for SQLEXPRESS

Right Click TCP/IP-->Proberties-->Ip Addresses---> IPALL --> set to 1433

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/18/2007 9:36 AM TR
SQL Configuration Manger ---> SQL Server 2005Network Configuration ---> Protocols for SQLEXPRESS

Right Click TCP/IP-->Proberties-->Ip Addresses---> IPALL --> set to 1433


--------------------

When all else fails, try the above - worked for me. Thanks!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/21/2007 8:07 PM Zdena
Hi guys, I have a problem with error: 40.

I made a Web page, and it works perfect on my local machine, everything is OK, until I uloaded page to the server, it reports this error:

ON MY LOCAL MACHINE EVERYTHING WORKS AS IT SHOLULD, BUT ONLINE WONT, PLEASE HELP

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server


i'm using folowing connectionstring in .NET :
Data Source=p3swhsql-v04.shr.phx3.secureserver.net; Initial Catalog=privreda; User ID=privreda; Password=pwd;

That's what my hostting gave me as my connectionstring.

Is it ok?


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/26/2007 4:02 PM Kala
"\sqlexpress" worked. Thanks a lot. Excellent forum.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/1/2007 12:21 AM Jo
Hi,
I am not able to connect to SQLEXPRESS with ,MachineName\SQLEXPRESS.. BUt it works fine with ip address.. Any clues

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/5/2007 11:59 PM Shweta
Hey..

Thanks a lot man..

I wasted three days lookin for this.. Finally I managed to establish connection..

Thanks a lot!!



# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/14/2007 1:08 AM Dharmendra B. Baiswar
Thanks for your valuable tips. I wasted the whole one day to get out of this problem. I change the Default server in named pipes & it works

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/21/2007 11:46 AM Adeel
Hi,

I tried all the solutions, but it didn't help.

I am trying to connect to the other system on my LAN, it has installed SQL EXPRESS . Now tell me how can I connect to that system using Management Studio Express.

I tried following:

1. Using named Instance MachineName\SQLEXpress
2. Enable All protocols
3. Set the IPALL = 1433
4. I didn't understand this :
"SQL Server 2005 Network Configuration -> Protocols for SQLEXPRESS -> Named Pipes
enabled, pipe name "\\.\pipe\MSSQL$SQLEXPRESS\sql\query"" ..... As I believe it has nothing to do with Connection using Management Studio Express

Note: The system name is like IT-DEVELOP-2. I don't knew but can it be a problem that hyphen"-" are present in the Instance Name.

Please Help!

Thanks.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/21/2007 9:21 PM Samuel
Tu si Tim, gracias desde Peru
Samuel

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/27/2007 11:05 AM Abdulla
Thank you and google in picking this thread.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/2/2007 1:24 AM Dave Bauer
Like the first response said, less then 30 seconds after reading this article, I said to myself -- "Duhh, add the instance name!" Bam, I was up.

Thanks for the help on a stupid oversight!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/31/2007 2:12 AM Wanxi
I still having the same error...
Can i write like this?

Dim con As New SqlConnection("Data Source=.;Integrated Security=True;AttachDbFilename=D:\Wanxi\myDB.mdf")

Please send me through email please?

Thanks
Regards
Wanxi

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 11/20/2007 4:09 PM Lubos
Hi guyzz,
this is what worked for me (opening connection to SQLEXPRESS via mssql_connect()):

$servername='&amp;lt;MACHINEALIAS&amp;gt;\SQLEXPRESS';
$servername = '\\\\.\pipe\MSSQL$SQLEXPRESS\sql\query';
$username='';
$password='';
$connection = mssql_connect($servername,$username, $password);
if($connection){
echo '&amp;lt;br/&amp;gt;SUCCESS - CONNECTED TO SQL SERVER !!!!';
$res = mssql_select_db('test', $connection);
if($res){
echo '&amp;lt;br/&amp;gt;SUCCESS - SELECTED DATABASE [test] !!!!';
mssql_close ($connection);


}else{
echo '&amp;lt;br/&amp;gt;FAILED - COULD NOT SELECT DATABASE [test] !';
}
}else{
echo '&amp;lt;br/&amp;gt;FAILED - COULD NOT CONNECT TO SQL SERVER !!!!';
}

Also I have these hints:

A) if u cannot get your connection working, most likely you might be incorrect about login USERNAME and PASSWORD. This is quite unclear (at least it is to me) how to add new administrator/guest after first installation.

B) have a look into CONTROL PANEL-&amp;gt;ADMINISTRATIVE TOOLS-&amp;gt;EVENT VIEWER-&amp;gt;APPLICATION. You may see lots of warning, report messages from SQLEXPRESS there, and also opened connections. E.g. I found there *Server named pipe provider is ready to accept connection on [ \\.\pipe\MSSQL$SQLEXPRESS\sql\query ].* which did a trick for me.

G'd luck!
XLubos

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/4/2007 6:43 PM Dina
gracias por el dato!!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/27/2007 11:51 PM Vihang
i am still getting this error.

Error in DBAcess.Execute - .Net SqlClient Data Provider An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

Please help me thanking you.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 1/20/2008 8:28 PM marc
Tim, yet another expression of gratitude from this little corner of the world! Cheers mate!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 1/23/2008 8:33 AM Yogeshp
Hi Friends,

I am encountered with following Problem,

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)



Why it gives error for sql2005 even i am using sql2000

Reply me

Thanks


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 1/24/2008 6:30 AM DJT
2 years later, and you are still getting praise!

THANK YOU!



# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 1/29/2008 3:00 AM Pratiksha
Server instance name did it for me.I am so thankful to you.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/5/2008 2:33 AM kemna
"Data Source=x.x.x.x,1118;Network Library=DBMSSOCN;Initial Catalog=Northwind;User ID=xxxx;Password=xxxxx;"

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/7/2008 1:35 PM Luis Robles
I am from a very far away place called Venezuela

Your advice has been so useful to me and saved me countless hours of development. Thank you very much

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/11/2008 12:21 AM vu minh tan
I spent more than a working day to fix it until I found your solution. I wonder why everybody has the same problem but this solution is not mentioned in any other sites I has visited.
Thank you very much.


# Same error, but only for local connection? 2/14/2008 1:47 PM Tracy Spratt
I can sucessfully connect to and query my server installation of sqlexpress 2005 remotely, using a dot.net webservice app on my development machine.

But when I publish that webservice app to the server (same machine as sqlexpress), I get this same error.

Any ideas anyone?

# Same error, but only for local connection? - NEVER MIND 2/14/2008 2:18 PM Tracy Spratt
Sorry, my problem was programmer error, due to inexperience with Visual Studio 2008.

All the above was very informative though, thanks all.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/15/2008 8:48 AM steven durfey
adding port name to data source when creating linked server got us going, eg: servername,1433

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/21/2008 9:57 PM Chad
And it is case-sensitive!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/27/2008 8:21 AM Katongole
same error

tcp ip, np,via,sm all enabled

remote connection problem but when trying to access surface area i get error that no components of sql 2005 were found

this after installing vs 2008 on vista

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/9/2008 10:32 AM cinthamo
i had the same error (Vista 64bit, SQL Server 2005 Express)

<machine name>/SQLEXPRESS

didn't work for me, but:

<machine name>/SQLExpress

does work.

So be carefull with the case...

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/1/2008 5:06 AM adi
hi tim,
thanks for the suggestion... it really worked.. i have been crushing my had since hours!
thanks,
adi

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/2/2008 5:49 AM Jim w
"we're not worthy!!"

Thanks much Tim!

# error CONNECTING SQL SERVER 2005 IN ASP.NET "Connections to SQL Server files (*.mdf) require SQL Server Express 2005 to function 4/9/2008 8:22 AM sunitha
I have the problem in connecting to database thru APP_Data(in ASP.net) page
Pls help me inresolving this

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/13/2008 6:20 AM Sharon
had the same error, and all that crap about enabling remote connections that i found on other web sites was wrong. i simply added \sqlexpress to the connection string!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/23/2008 11:40 AM mustafa
Thank you worked like a charm.



# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/24/2008 6:02 PM sri
when ever iam trying to connect localdatabase iam getting error. if i connect to remote server it is working properly.
my local server name is VIJAY226336\SQLEXPRESS when iam trying to give my server name. iam getting error at the position of \. showing un reccognized escaped sequence.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/30/2008 12:41 AM Abhijt
While creating new database file in sql server 2005 with any new project it gives me error message that "An error has occured while establishing a connection to server. When connecting to sql server 2005, this failuer may be caused by fact that under the default seting sql server does not allow remote connection.(provider:Named Pipes Provider, error:40- could not open a connection to Sql Server )" such long message, guide me

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/14/2008 6:23 PM Nitin V Singh Chauhan
On simple sql update statement to a db on linked server, I get below error:

Named Pipes Provider: Could not open a connection to SQL Server [5].
OLE DB provider "SQLNCLI" for linked server "XXXXX" returned message "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.".
OLE DB provider "SQLNCLI" for linked server "XXXXXX" returned message "Login timeout expired".

There are triggers on the remote db server which again update my db (on different server) and here i get the error.

Please suggest.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/22/2008 2:08 AM Bhushan
Best one!!!!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/1/2008 9:36 AM Steve and Ann
AAAAAAAAAAAAAAAAAAAAARRRRRRRRRRRRRRRRRRRRRRGHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
IT WORKEDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD...I want to cry....we have been (*&)(*&)(* for 3 days on that!!!!
Thank you


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/4/2008 10:06 PM Ranjan Nayak
Could you please give any suggestion about this error.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/20/2008 5:57 AM Shanaka
Hi Tim,
I fixed my problem... Thank you very much... I have installed several times VS2005 since I thought it is a problem with the installation... wasted my time... again again thanks a lot...

Shanaka

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/9/2008 6:57 PM Anders Ericsson
Beutiful. Spent a couple of hours with this! Sorry for you guys spending days without consulting your local google service. :)

/Anders
Oxelösund, Sweden

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/28/2008 7:41 PM Leila
GREAT!!!!!!
thank you for your help.
My problem has been solved.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/7/2008 12:39 AM emi
thanks..problem solved...wish u the best!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/17/2008 5:51 PM Cristina
Hi,
I have a server on which runs both WMSDE and SQLEXPRESS. WMSDE was first installed with SharePoint and yesterday I installed SQLEXPRESS. When I run SVRNETCN.exe I can enable TCP\IP and Named Pipes for the WMSDE but when I swich to SQLEXPRESS I get no protocols at all.
Can enyone help me?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/31/2008 5:20 AM Romel
Stuff in hear is really useful, works like a charm ...cheers

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/31/2008 5:55 AM Corwin Joy
Great tip. Here is the full set of steps you will need if you want to activate the sa login under SQLEXPRESS:

1. From the command prompt connect using default windows authentication via:
sqlcmd -S localhost\sqlexpress

2. Setup sa password.
sp_password @old=null, @new='complex_password', @loginame = 'sa'
go

(It may be that SA was not installed with a NULL password, in which case you can add a new sysadmin user via)
sp_addLogin 'username', 'pass'
GO
sp_addsrvrolemember 'username', 'sysadmin'
GO

3. Enable sa
alter login sa enable
go

4. Enable "mixed-mode" authentication in the registry.

(Otherwise you get an error like: Login failed for user 'sa'. The user is not associated with a trusted SQL Server
connection.)

You can enable mixed - mode authentication in the Registry by changing the LoginMode value from 1 to "2", here:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL.1\MSSQLServer

LoginMode =2

5. Try the login!
sqlcmd -S localhost\sqlexpress -U sa


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 10/31/2008 5:58 AM Corwin Joy
Oh, one more thing, in step 4 above, after you enable mixed-mode authentication you will need to restart the SQLEXPRESS service. You can do this via the SQL Server Configuration manager that comes with SQLEXPRESS.

Also, enabling the SA user may make your box less secure, I'm not a SQL Server expert...

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 11/15/2008 2:49 AM Zoran
oh my god this was just what i needed it solved my problem rightaway.MS should made it more clear that it should of been the instanse to.. thx for the great post

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/10/2008 5:52 AM Manish Sohaney
Thanks. It helped a lot. Also remember to blank-out the "ConnectionStringOption" field, if you are not using windows authentication for SQL Server.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/17/2008 4:19 PM vivek
how cani know about server name.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/18/2008 12:03 PM Acrobatic
finally. thank you, putting the instance name did it. screw you microsoft.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/19/2008 4:19 PM Boopathi
Thanks a lot for your posting. Spend couple of days on this.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 1/18/2009 8:51 AM boomshanka
holy shitballs I owe you at least 2 hours of web development for posting this...so much for OOTB :-)

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/9/2009 8:53 AM J Allen
Tim - Here it is Feb 2009 and after all this time your post stil gets this from me ... thank you, thank you, thank you, Thank You, Thank You, Thank You, THANK YOU, THANK YOU, THANK YOU!!!! Oh, and did I say ... THANK YOU!!?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/22/2009 3:13 AM ZEE THIRTEEN
Thanks! i am using visual web developer 2008 express edition and received the named pipes error setting up a db connection. the fix was just putting my server name in the server name box. if i tried to add anything more "\whatever", then it would fire up a numbered instance error. anyways,
THANKS

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/6/2009 1:05 AM PrakashKS
Tim

Thanks a lot....i had to spent more time on this..finally you resolved it...thanks again....

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/6/2009 1:17 AM Mano
Hi All,
I'm still getting the error message. below is my code.

string cnstr = @"server=machinename\sqlexpress;integrated security=true;";
SqlConnection sqlcn = new SqlConnection(cnstr);
Server server = new Server(new ServerConnection(sqlcn));
Database AutofeedsDev = server.Databases["AutoFeeds"];
Microsoft.SqlServer.Management.Smo.Table categories = AutofeedsDev.Tables["tbl_auto_Feed"];
StringCollection script = categories.Script();
string[] scriptArray = new string[script.Count];
script.CopyTo(scriptArray, 0);
Please help me from this hell...

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/18/2009 4:54 PM jitin
can somebody elaborate it for me please??

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/24/2009 7:29 PM s3
Thanks for the post. It helped me fix the issue without spending too much time...

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/25/2009 1:09 PM royal
thx 2!!

wasted more than a day, not knowing the thing with the instance name (wasn't mentioned in the book i'm currently reading)

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/9/2009 2:52 PM Trist
Thank you so much!!! can't believe how much time I wasted on that crap when I set up a dev server.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/18/2009 10:19 AM deraz
I'm still getting the error message

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 26 - Could not open connection to SQL Server 4/20/2009 5:04 PM lamia
not working with me

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 5/22/2009 12:42 AM Mahinda
thanks.
we must correctly specify the instance name in the form
HostName/InstanceName

HostName=Name of the computer from my computer properties
InstanceName=default for this is SQLExpress.

Thank You so much tim.


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/8/2009 7:29 AM harsh gupta
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/26/2009 4:30 AM pauline
I have installed a default instance of SQL server 2005 on XP home and all seems to be working OK using Management studio. However, if I try to make a connection using SQLCMD -S <LOCALHOST>\SQLExpress I get a version of this error. I've tried all combinations of upper/lower case, computer name etc and can't get it to work.
I've heard rumours about issues with XP home and SQL server because of the absence of IIS. Is this the problem?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/29/2009 1:34 AM Ashwin

if we done all the setting as mentioned above
plzzzzzzzzzzzzzzzzz put (.\\SQLEXPRESS)


CONN_STRING = "Server=.\\SQLEXPRESS;Initial Catalog=master;Integrated Security=SSPI";

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/31/2009 11:00 AM Siddharth R. Gavhande
PLEASE...SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server
I AM USE DATA BASE DOTNET ,FRAMEWORK SOFTWARE...
SO HOW I SOLVE MY PROBLEMS CAN U GUIDING TO ME

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 11/10/2009 11:10 AM Farsh
thanks for telling that there should be the comuter's name as well as server name

# re 12/22/2009 12:57 AM Jack
use Server=.\SQLEXPRESS is a good idea

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/29/2009 1:47 PM rohan
not working for me tried all the combinations...

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 1/12/2010 9:22 PM Balloon
Thank you very much, Tim

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/1/2010 8:38 PM Badharudeen.N
how can i overcome this problem..please help me

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/22/2010 5:31 AM Reena Gupta
When i am going to make a connection with sql server2005
then login failed error occur..what is the solution for this?



# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/11/2010 4:24 AM noone
PERFECT instance name !!!!!!!!!!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/11/2010 4:25 AM noone
PERFECT with the instance name !!!!!!!!!! thx dude

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/2/2010 2:57 AM Anuradha
Great , you save my time

I had give .\RTC which was my unstance

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/10/2010 11:17 PM majid mansouri
hello my friend
i have this error but i cant find this problem i have been setting SQL Server Configuration Manager and make sure you've enabled Named Pipes & TCP (if you're using it) and also go into the Surface Area Configuration tool and make sure you've set it for local &/or remote connection for the connection types you want to use. Then restart the SQL Server (instance) service but i have this problem please help me

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/13/2010 3:24 PM Little
Thanks so much...
I have been trying to fix this error for so long With SQL Server 2008
By luck..Read ur post....
It worked....


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 7/20/2010 9:20 AM Anonymous
Good advice. Microsoft's error messages always seem to steer you in the opposite direction. Here is an article directly from the horse's mouth about this error: http://blogs.msdn.com/b/sql_protocols/archive/2007/03/31/named-pipes-provider-error-40-could-not-open-a-connection-to-sql-server.aspx

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/19/2010 7:36 PM LisaC
Wow thanks so much! I've spent all day trying to work out why we can't even open SQL management studio and turns out to be such a simple thing. servername\sqlexpress.
This is with a new install of SQL 2008 R2 - so the solution is still relevent after 4 years

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 12/3/2010 4:19 PM jim mac
What exactly is an "instance" name

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 1/15/2011 9:02 AM Palash Chakraborty
I also faced such problem but i was find out the solution. The solution is:
string ConnectionString=@" Server=localhost\SQLEXPRESS;Database=myDataBase;Trusted_Connection=True";

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/13/2011 8:24 AM rajesh sawant
Dear Sir,
thanks, after all i am feeling like the sun is out.
Thanks again

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 4/22/2011 7:33 PM rajesh
Thanks friend!

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 6/5/2011 10:41 PM raja
can someone help me please, i am getting this error and i have windows shared hostign with godaddy?

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 8/27/2011 3:44 AM Rakesh
im getting this error only while connecting from pc with windows 7 while pc with xp works fine.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/5/2011 2:09 PM Paul
Make sure you SQL Browser service is also running on the server. This did it for me after all other options.

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 9/18/2011 2:12 PM aca
thank you very much it@s really helpfull

# SQL Server 2005 SQLExpress error 9/28/2011 1:53 PM ahsan
<?php
$server='muhammad-pc\\SQLEXPRESS';
$con=mssql_connect($server,"","");

mssql_select_db("test",$con);
$query="insert into a(id) values($name)";
mssql_query($query);


?>


# re: SQL Server 2005 SQLExpress error: 9/28/2011 1:55 PM ahsan
<?php
$server='muhammad-pc\\SQLEXPRESS';
$con=mssql_connect($server,"","");

mssql_select_db("test",$con);
$query="insert into a(id) values($name)";
mssql_query($query);
?>
Help me this code is not working.
mssql_connect() function error.


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 2/29/2012 6:14 AM vaishali
hey friends i had same problem from 15 days and now i fix that i use .\sqlexpress for window authentication it fine works but for sql server authentication it not accept sa as password it says its not trusted user password what to do? and thanx to all that atleast i can work on windows THANKUUUUU VRY MUCH

# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/13/2012 1:54 PM sornavasu
i have tried all those procedure as u discussed earlier in this blog...
Im using sql server mgt studio express .. i did my connection in sql 2000, i want to run it on 2005 ... kindly tell me how to sole this named pipe error... pls help meeeeeeee


# re: SQL Server 2005 SQLExpress error: ...provider: Named Pipes Provider, error 40 - Could not open connection to SQL Server 3/17/2012 1:38 AM Mohan verma madhya pradesh
i done everything as you has written but still the problem is same while executing the application and feeding the data into the text boxes and giving submission the problem is same

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