In Microsoft BizTalk Server, multiple instances of the same message are dropped in the receive location. If the messages are processed at the same time, an error that resembles the following may be logged in the Application log:
A message sent to adapter "FILE" on send port "SendPortName" with URI "URI" is suspended.
Error details: There was a failure executing the send pipeline: "Microsoft.BizTalk.DefaultPipelines.XMLTransmit, Microsoft.BizTalk.DefaultPipelines, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" Source: "XML assembler" Send Port: " SendPortName" URI: "URI" Reason: Type ‘TypeName’ is not declared.
Error details: There was a failure executing the send pipeline: "Microsoft.BizTalk.DefaultPipelines.XMLTransmit, Microsoft.BizTalk.DefaultPipelines, Version=3.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" Source: "XML assembler" Send Port: " SendPortName" URI: "URI" Reason: Type ‘TypeName’ is not declared.