BIP2448
Severity
20 : ErrorMessage
(<insert_0>, <insert_1>) : Illegal operand for NOT operator applied to value '<insert_2>'.Explanation
The operand for the NOT operator must be a boolean expression. An attempt was made to apply the NOT operator to an inappropriate value.Response
Correct the syntax of your ESQL expression in node '<insert_0>', around line and column '<insert_1>', then redeploy the message flow: Ensure that the NOT operator is only applied to boolean expressions.