Too many edge vertices? Never heard or seen that error before. From the manual:
Quote:
CRITICAL ERROR: Map size
CRITICAL ERROR: ...overrun
CRITICAL ERROR: too much ...
The map is way too big or contains too much or too complicated polygons to be compiled. Erase a lot of blocks. Replace block objects or prefabs by map entities.
Your case relates to the "too much" part. Do as what the manual has, but you can also use models in addition to what is given here. It's the only option that I know of. If someone else can think of something, you may get other ideas to go by.