MID({!$Flow.FaultMessage}, FIND('FIELD_CUSTOM_VALIDATION_EXCEPTION: ', {!$Flow.FaultMessage}) + LEN('FIELD_CUSTOM_VALIDATION_EXCEPTION: '), FIND('. Você pode consultar valores de ExceptionCode', {!$Flow.FaultMessage}) - FIND('FIELD_CUSTOM_VALIDATION_EXCEPTION: ', {!$Flow.FaultMessage}) - LEN('FIELD_CUSTOM_VALIDATION_EXCEPTION: '))