Well, I updated to 4.06 (apparently I had only been running 4.02!) but I got the same error message :( It happened right after I changed a material one of my objects, giving it a texture map and bump map from one of my jpegs. Any other ideas? Thanks again so much, Jenna PS- I've also been having some weird problems that no one can figure out importing Poser objects into Amorphium Pro, so maybe my computer is just whacked :)