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Editorial Team
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Asked: 2026-05-29T07:09:04+00:00

I have a BizTalk orchestration with an expression. The expression has the following: construct

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I have a BizTalk orchestration with an expression. The expression has the following:

construct msg_mymessage { msg_mymessage = msgInputXML; }

msgInputXML and msg_mymessage use the same schema, same message type and both show up under the Messages in Orchestration view.

After the expression I have a Construct Message and in the Construct message I have a Transform that uses msg_mymessage as a source and some other message as a destination.

I’m getting the errors:
use of unconstructed message ‘msg_mymessage’
‘msg_mymessage’:message has not been initialized in construct statement

I’m not sure why I get this error. What should I be looking for?

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1 Answer

  1. Editorial Team

    Make sure that you use an assignment shape (inside a construct message wrapper) when you create msg_mymessage. Then just copy the code in the expression shape (msg_mymessage = msgInputXML;)

    http://msdn.microsoft.com/en-us/library/ee253499(v=bts.10).aspx

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