Hi Sorry for my high activity level, but when working with something as addicting as chuck, you just go on and on :-) Anyways, I was a bit surprised that the attached code doesn't work, shouldn't it (undefined type 'myEvent')? Of course I can split it int two files and declare myEvent public (or not have bla public, but I need a public class...). -- peace, love & harmony Atte http://www.atte.dk | quartet: http://www.anagrammer.dk http://www.atte.dk/gps | compositions: http://www.atte.dk/compositions class myEvent extends Event{ int value; } public class bla{ myEvent some_event; }