Thomas Zastrow asks about what I suspect is a stack overflow in Mac OS X. (I don't read German :-) If I'm right, SyncRO has documentation on this. See http://www.oxygenxml.com/doc/ug-oxygen/set-parameter-in-startup-script.html. I've also written up some. Look for the word "Java" in http://www.wwp.brown.edu/encoding/workshops/uiuc2009/handouts/xml_exercise.html.