collision problems

I have a problem in the collisions. when I try to compile my model does not have a physical part and I get this text:“WARNING: Model has 2-dimensional geometry (less than 0.500 inches thick on any axis)!!!” that part is a thick coat so it does not! how can I solve it?

http://imagegecko.net/upload/wvcwve.JPG

http://imagegecko.net/upload/s c.JPG

Found the fix on the Valve Developer Community website.

More error fixes can be found here.

Next time you should try Googling your error. :smile: