What would cause this crash?

I am making a turnbased game and after about 30 turns the game freezes and I cant even use Ctrl-Alt-Delete to get back to the desktop so I have to restart the PC.
Has anyone had this problem before?

Sounds like a massive memory leak.

Have you tried running in debug mode?

I would also say this is the problem.

Just in case you don't understand this Slenkar, it means that every turn, you create things (types, entities, textures, whatever), but you don't clean them up at the end of the turn, so they pile up in memory.

Try to run it in windowed mode and see of you lose lots of memory each time it runs (use sys monitor or something). Also have a look at AvailVidMem.

thanks Ill give it a go,