BIP2432
Severity
20 : Error
Message
(<insert_0>, <insert_1>) : The correlation name '<insert_2>' is not valid. Those in scope are: <insert_3>.
Explanation
The first element of a field reference must be a valid correlation name, from those in scope. This message may sometimes be due to an incorrectly formed or spelled expression which is not intended to be a field reference being parsed as if it were a field reference because the parser does not recognize it.
Response
Correct the syntax of the expression and redeploy the message flow.