Hi Pete, excellent! I think you found it: "check also that you don't got some damn stupid power saver thiny turned on cause your proccessor could be forced to idle and the drives going to sleep that could lock up Vue. " I just reinstalled Windows couple of days ago, and haven't changed the power savings settings, yet. Duh. Small wonder it craps up. bangs head At least the problem with my latest render has been cleared, now. Thanks a lot. :) Also thanks for the Wintop hint, I'll check it out. The trick with the mouse should have been obvious, too . . . eh. Need more coffee, I suppose. I'm looking forward to your render, btw. Sounds exciting. Do you have a dedicated render machine for your 100h+ renders, or do you simply not need your computer for anything but Vue? ;) Again, thanks! ta, -Sascha.rb