which version of 3dgs are you using... Go to help>about and type what it says there here... Example > Gamestudio commercial 6.40.2/wed v6.723

Yours may differ...

Also did you use snap to build your levels?

Im not sure if I understand your problem correctly? Is it compiling but just taking very long... Or is it not compiling at all?

http://www.freewebs.com/otama_syndicate/index.htm - Each master to his own technique.

- Not me said the bee, Nor I said the fly.