Now I know this can mean a lot of things, but mine says 'unknown function      self achievement_notify ("DLC3_ZOMBIE_BOWIE_KILLS");

I have had this error for about a week and I can't figure out what's wrong. Any suggestions?

make sure this is in _zombiemode_utility.gsc at any point (just search for it)

achievement_notify( notify_name )
{
	self notify( notify_name );
}

also make sure

#include maps\_zombiemode_utility;

is one of the very top lines in _zombiemode_score.gsc

if error persists show me whats around that line (should be in _zombiemode_score.gsc)

Thanks I think the error has gone but now when I try to launch my map it says 'unhandled exception caught' and the game says 'not responding' then crashes. ??