Hi there.

Okay, so I'm building my first custom zombies map for World at War and I'm trying to create a buyable door. I already did the modelbrush step, but I get an error when trying to actually make it buyable by using the trigger - use function but when I try to do that, Radiant gives me the following error: Failed to create entity

Why is this?

Any help would be GREATLY appreciated. Thank you.