constraint problem

I was trying to create a movement system for this soldier but when I try adding a constrain to the bone(Ltorso), the .blend crashes…

http://www.savefile.com/files/4768066

thisb looks like a serious error in blender and appending wont work…can anyone fix this??

Constraints don’t work in the game engine.

Your link is brok’d

You can use constraints in the game engine, but you have to use P2P, hinge, and any other constraints designed for the game engine through python.

I think 2.41 only has the point to point constraint and hinge is in the new preview builds.