I'm sorry it doesn't help much. Thanks though.

I dont have any other programs open when I compile it. (Just the level in WED and the map compile program)

I was trying to trouble shoot this issue.

I was thinking I had way too many polygons in the scene. (Too many CSG subtracts.) So I was trying to do put in map entities. However, it still got hung up as it built the 'fat hull'.

I'm going to try to remove more blocks to see if this is the problem.

Also, my entire map is on a thin plane (no walls) and is surronded by a skybox. Is this another issue?

Thanks for any and all of your sugesstions.