BIP2547
Severity
20 : ErrorMessage
(<insert_0>, <insert_1>) : <insert_2> field name expression cannot evaluate to a CHARACTER value.Explanation
A field name must be a CHARACTER value. The expression supplied to <insert_2> cannot evaluate to a CHARACTER value.Response
Correct the syntax of your ESQL expression in node '<insert_0>', around line and column '<insert_1>', then redeploy the message flow.