java upoc inserts null in log file for every message?

I’m using Cloverleaf 5.5 on a windows machine.

In my Java UPOC protocol I populate a DispositionList and return it to Cloverleaf.

When Cloverleaf reads these messages, it outputs “null” in the engine output for each message.

I figured it out. There was a System.out.println statement in my code. If you use a System.out.println, it will put a null in the engine output / log file.