Do not open inventory

[Rayke]

When I click on the opening inventory, get a critical error.

[jens]

Might be missing a file so try to reinstall the game.

[Googolplex]

I red something about that, seems to be fixed in one of the later versions of the game.
You already have installed patch 1.1?
http://support.frictionalgames.com/entry/95/