Aww,poo...

Dr. ROCKZO

L8: Fancy Shmancy Member
Jul 25, 2009
580
159
I had this in my short history of 2 days of mapping when I made a quick test room. After clicking "check for map errors" or something similar and fixing what it said (Impossible vertices) It worked perfectly..
 

AntonJ3000

I am inactive and make horrible maps
Oct 29, 2008
401
90
If you messed with Map Properties, you can try reverting it, like "title screen on map load" or something like that used to crash my map when I tried it.