What do i do??? i've looked at the error on Map Craft and it says this "Fixes 1. If you can't find the offending area, then run the -light phase with the -lomem string to disable the trace tree subdivision. 2. Your map may be quite complex. Did you use a larger _blocksize key? Try _blocksize 8192 (or 16384) in the worldspawn.
Whats the first one mean???
most likely you have a spot in ur map where you have a cluster of geometry getting sliced up really bad. Search ur map from the last compile for anything thats would meet what I said.
(lomem is a q3map2 compile.. use as a very last resort.)