It sounds like you've already covered most of the potential problems and answers. The only one I can add is that the Out Of Memory error is Poser's multi-purpose error message. Imagine some little kid who doesn't want to do any research so he/she can give you intelligent feedback. Any time something goes wrong, the kids says "Out of memory, out of memory." Hopefully this weird error message will be fixed in Poser 5. One other thing that might cause the Out of Memory error would be a corrupted rsr file in geometries. Ron