Posted May 26, 2011
Have you tried this one: http://en.thewitcher.com/community/entry/35/#comment-212465107 ?
BenHurt: Did reinstalling and patching work? I am getting the same message about my an invalid or incomplete version and exiting. My installation was pure vanilla (no mods, only the troll trouble dlc) from the DVD's and I downloaded the Patcher_ATARI patcher which is supposed to be for the North American DVD version.