"There was an unknown problem during the build"

Hey, when i try to build my world (green button), the process gets stuck and i get a message: “There was an unknown problem during the build”. any solution?

P.S sorry for my lousy english.

Could you give us a bit more information or upload your network so we can take a look?

Well i dont think my settings matters because even when i try to render with the default setting and network i get this weird message.
Just in case, i uploaded a screenshot http://img2.imageshack.us/img2/8938/walll.jpg
Thank you!

Is memory conservation turned on? If so, turn it off and try again.
If that fails: Have you tried reinstalling World Machine?

Tried both of them, none works, any other ideas?

You could switch to a different version, for example 32bit instead of 64bit - or if you’re using the free version: Wait for WM 2.2 and hope it doesn’t happen with the new verison.