Interupted a BSP, now I get file creation errors

[DividedByZero]

I realized I forgot to add lights to a map, so I stopped the bsp. Now when I go to do a bsp it just says file creation errors under each little pargraph (this happens pretty much instantly. What do I do to fix it?

[silverwest]

i'd first try deleting the bsp file, and then trying to compile it

 

if that doesn't work, try save as, and make a different .map filename.