Still, converting to smaller componet files might also make a 'bad geometry' easier to find. It's the way I debug C code when and if I write it - when you find out which section the problem is in you can keep subdividing the problem "section" until either the program finds and corrects the geometry (if that is an option) or you do. I don't know anything about Cinema, but in some programs if you use boolean operations a bad operation(either neutral combined with any boolean type or booleans that don't intersect) can be enough to cause problems. - TJ