Message type: E = Error
Message class: BRF - Messages for Business Rule Framework
Message number: 446
Message text: The result type of expression &1 must be Boolean
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
If the rule line contains an action, the result type of the expression
must be Boolean.
The result of the expression decides whether the action is executed or
Error message extract from SAP system. Copyright SAP SE.