BizTalk Build – unknown system exception

While there can probably be many reasons for this error, here’s one that I had:

msgNew() = “”;

There was not value in the parentheses. For some reason, this does NOT put the red exclamation point on the Message Assignment shape.


I had been testing the following, then changed it, and forgot and left it blank

msgNew(BTS.OutboundTransportLocation) = “”;





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