You may receive a "Microsoft.BizTalk.DefaultPipelines.XMLTransmit" error message when you send a document in BizTalk Server 2004 (883374)

SYMPTOMS

When you process a document with Microsoft BizTalk Server 2004, you may receive an error message that is similar to the following:

"Microsoft.BizTalk.DefaultPipelines.XMLTransmit" Source: "XML assembler" Send Port:
"SQL://CTODC03/Hemodialisis/" Reason: This Assembler cannot retrieve document
specification by using this type: "http://SQLRec#ReqError".

CAUSE

This problem occurs when one of the following conditions is true:

You deploy multiple assemblies where each schema contains the same namespace and the same root node. When the BizTalk Server engine tries to find the schema for the document that you are sending, the engine finds multiple matches.
You deploy assemblies that do not contain a schema that matches the namespace and the root node.

RESOLUTION

If this problem occurs because you deployed multiple assemblies where each schema contains the same namespace and the same root node, undeploy all assemblies where schemas contain the same namespace and the same root node to resolve this problem. Only deploy one assembly for each namespace and root node for a schema. If you have to use one schema for multiple projects, create an assembly that contains the schema, deploy the assembly, and then reference the assembly from your other projects.

If this problem occurs because you deployed assemblies that do not contain a schema that matches the namespace and the root node, include a schema that contains the correct namespace and root node for the document that you are trying to send to resolve this problem.