It's not selecting anything, but I think I've isolated the cause, somewhat...
For whatever damn reason, some of the evil8 textures that generate light (the pretty light trims like in ps9ctf) cause a LOT of those 0 axis errors. I replaced every evil8 trim with a dsi trim and the map can compile with lighting
just fine. I found this out because I tested a compile on a very simple map with the same textures, same results when changed on the big map.
The new trims look pretty anyway. Looks like it's going to be a nighttime map.
Gotta finish lighting, then weapons/entities/spawns/etc. Then it should be good to go!
... thought I'd include a preview: