In one of my scenarios I get an error message that the World-contstructor had caused an exception and further details could be seen in the console window - buts the console window is empty (even if I trigger the opening by writing to System.out). The bug occurs on opening the scenario for the first time, after a call to 'recompile' and mostly after reset. Opening the scenario manually (by calling new SubclassOfWorld()) works fine. I could upload the scenario in question if I knew where.