Thats bad Mark I've never seen that. Me too, I just got back my computer few days ago and had to re-install every thing and Vue 4.06 works fine. Yes, 06 has to be installed over the basic Vue 4. Havn't you, by accident, choosen the incremental 06 patch? Or the 06 MAC patch? insteed of the full update? I'm sure there is something funny happening in your computer, because Vue 4.06 really works better then all the previous versions. I think you have no choice. Uninstall completely Vue (including all the Vue ini files and registry entries. Then install Vue 4 from the CD and use it once for a fast sce (create some spheres and thn close Vue). Immediately after install the full 06 Update. Hope this helps. Please tell us. I'm thinking on you; good luck! Guitta