I was working on my game engine a few days ago, and when I ran the program in ''normal'' mode (Debug build), VC++ would illegal op, but the game engine would work fine and continue operating. If I ran the application in ''debug'' mode (again, Debug build), VC++ would catch the error and close the program. Finally, the program runs fine when launched separately (not spawned from VC++). I''ve since rebooted a few times, changed the program, and it seems it''s only happened that once. I don''t have service packs installed, this is a Direct3D program (using Voodoo3 3000 AGP card with latest non-beta drivers) run in Windows 2000. Just wanted to know: has anyone else has ever experienced anything similar to this, and what might cause it? MatrixCubed

Sounds like some form of alignment confusion with the debug libraries. VC also does some mild strangeness when launching with the ! rather than directly from the OS. Normally it shouldn''t cause problems. Turn the warnings up to extra picky and see if anything it complains about is interesting. Asside from that it''s a case of "doc it hurts when I do this".