I'm running a P4 1.7GHz, WinXP Home w/o SP1, 512MB RAM, Poser 5 with SP1. I have exported several wavefront obj files, no C exception errors yet during them, although I have had a few in other areas. I just fired up Poser 5 again today while online now and exported a pair of boots as 3ds and no problems. I checked out the model in Deep Exploration and it looks fine there so the export worked properly too.