Compile BSP Error

[rB|Liam*]

Ok, i dont have a clue whats gone wrong but when i try to compile bsp i get this error:

expression:
epairlist_haskey( mapent->epairs, "origin") || !strcmp (classname, "worldspawn") || !strcmp( classname, "func_group")
module: c:\program files\activision\call of duty 4 - modern warfare\bin\cod4map.exe
file:.\map.ccp
line: 1538

it seems to be after iv added the lightgrid_sky but im not sure if that is the problem
someone help me please, thanks.