Let’s continue the saga of the project that hates me with another error that commonly happens in this solution. Yesterday, it was about cannot find symbol ‘Common.Processing.Invoke_ProductCanonical_Type’. Today, while making some changes to an existing BizTalk Server project, I encountered a similar error but with different behavior.
Severity Code Description Project File Line Suppression State
Error cannot find symbol ‘mpm_SRCGRLRequest’
Severity Code Description Project File Line Suppression State
Error identifier ‘mpm_SRCGRLRequest’ does not exist in ‘unnamed’; are you missing an assembly reference?
Severity Code Description Project File Line Suppression State
Error must be ‘messagetype’, ‘class’ or ‘interface’
📝 One-Minute Brief
Seeing BizTalk build errors like “cannot find symbol ‘mpm_SRCGRLRequest’” even though the Orchestration Designer looks fine? The editor likely lost the reference to that multi-part message type.
Fix: in Orchestration View → Multi-part Message Types, cut (Ctrl+X) the offending symbol and paste (Ctrl+V) it back to refresh the artifact, then rebuild.
The biggest difference between today’s issue and the previous one is that, visually, there is no issue reported by the Orchestration Designer. Everything is ok, and it doesn’t matter how many times you build the solution; this issue doesn’t want to go away.
Cause
This is a strange error that is difficult to explain or find a reason for. Basically, the editor is confused and not identifying the correct reference for this symbol (or orchestration artifact).
But luckily, we have an easy way to solve this issue.
Solution
The solution to this problem is very simple, and you just need to:
- On the orchestration design, access to the Orchestration View, expand Multi-part Message Types, and select the symbol in our case: mpm_SRCGRLRequest
- Delete the symbol by clicking CTRL-X.
- And then paste it again by clicking CTRL-V
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