Anyone know's how to fix this?


UNRECOVERABLE ERROR:
Max cells exceeded --->
Linker will now terminate.

If you send me a pm with a mediafire link to your map I will fix it.
You can also probably fix it yourself by doing these in radiant.
Fix any red or "node without volume" errors from launcher.
Caulk faces of unseen brushes.
Look in the radiant 2d view for brushes that are not snapped to grid or aligned with another brush.
Make sure no brushes are intersecting unnecessarily.
Make all stairs and railings into detail brushes.
Mitre edges of 2 touching brushes when possible and caulk the unseen faces.
Fly around under the map and look for any mapping errors or brushes you forgot about.