Game has strange crash on specific loading screen...

[Goathead]

Whenever I use the elevator mine entrance on Montero, the loading screen comes up, completes, but then it just freezes at completion and an error message comes up that says "Can't use "atom" function set". I have no idea what this means.

I can still alt-tab out and/or ctrl-alt-del the program, but I really want to get in that mine! I've been in there before with the same file, the crash has just been there since level 27 or so.

The rest of the game works fine, so far. I'm not great with computers, but any help at all would be greatly appreciated.

Thanks!