To locate CTDs or just to see what happens during the start and quick flight selection inside FU3 use FileMon from www.sysinternals.com you can see each file activity with location and read offset. So you can learn which files are opened in which sequence, how models are loaded. This can help in debugging FU3 bugs. You can see which tiles are loaded, which part of resources - ones you know the offset and length of the read operation it's easy to locate it with ResViewer then you know which part it is. http://www.agtim.ch/fu3/images/FileMonStart.jpgThis is the settings at start, click on OK and then start FU3 http://www.agtim.ch/fu3/images/FileMonRep.jpgafter CTD or end of the game you can use the report (Save, Print, Analyze...) :-wave agtim

Sounds good, and the site looks interesting (but too technical for me). I'll give it a try.Thanks, Robert.