Have you seen an error that looks like the one below on your Send Pipelines?


There was a failure executing the send pipeline: “Microsoft.BizTalk.DefaultPipelines.XMLTransmit” Source: “XML assembler” Send Port: “some location” Reason: This Assembler cannot retrieve document specification by using this type: “namespace#rootnode”.



This is caused by not having a unique combination of namespace and root node (MessageType).  BizTalk by default does not like unrecognized messages.  The XML Disassembler has a setting to allow unrecognized messages.  But what about sending unrecognized messages?



To allow unrecognized messages inside the Send Pipeline, just set the XMLNORM.AllowUnrecognizedMessage message property to True inside a Message Construct shape.  This, of course, assumes you have to construct your output message inside the Orchestration. 



The statement inside your Construct shape should look like this:


OutMessage(XMLNORM.AllowUnrecognizedMessage) = true;