When a MVEL transformer is configured for a type in an IP it is expected that the result value is String. Unfortunately when the transformer is mis-configured and returns other type it is just silently converted to null without any information or log message. It is very hard to find such a configuration mistake. It seems that other transformers do the same.
Gary Brown <gary> updated the status of jira RTGOV-251 to Resolved
Verified in ER2
Gary Brown <gary> updated the status of jira RTGOV-251 to Closed