You must need to deploy the standard EDI schema against which you need to receive your EDI document. Most of the time in the initial stage of the EDI developments, developer assume that just by adding the edireceive pipeline and configuring the party is suffiecient but this is not the case. I will be detailing about this scenario. If the schema is not deployed you will receive below error messages.
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An output message of the component "Unknown " in receive pipeline "AS.MS_BTS.Common.Pipeline.EDI.EDIReceiveAS.EDIReceiveAS, AS.MS_BTS.Common.Pipeline.EDI.EDIReceiveAS, Version=1.0.0.0, Culture=neutral, PublicKeyToken=5753f508dd524570" is suspended due to the following error:
Unknown .
The sequence number of the suspended message is 1.
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If you look at the error in more details by double clicking on the Service Details under the BizTalk Group page and browse to the Context properties and try to see the value of Message Type, you will see the below information against the Message Type.
http://schemas.microsoft.com/Edi#WildcardSchema
This value as WildcardSchema shows that the related schema has not been deployed. Once the schema is deployed you should see the MessageType value as below which tells that message type of the received EDI message is X12 version 00401 and 990.
http://schemas.microsoft.com/BizTalk/EDI/X12/2006#X12_00401_990
Also if you look at the message it will come like as below before deploying the schema as the EDI disassembler component has not been able to resolve the EDI message.
<UnrecognizedSchema>
<UnrecognizedSegment>ST*990*1300001</UnrecognizedSegment>
<UnrecognizedSegment>B1*RWIT*164428*20091028*A</UnrecognizedSegment>
<UnrecognizedSegment>N9*CN*0635670</UnrecognizedSegment>
<UnrecognizedSegment>SE*4*1300001</UnrecognizedSegment>
</UnrecognizedSchema>
So make sure that you deploy the required schema. Please refer below in the Post to see How to develop First BizTalk EDI project.