I get this error as soon as i meet an enemy npc in game... and now i can find "harmonica" and pda in almost every npc corpse... strange...

FATAL ERROR
 
[error]Expression    : fatal error
[error]Function      : CScriptEngine::lua_error
[error]File          : D:\xray-svn\xr_3da\xrGame\script_engine.cpp
[error]Line          : 74
[error]Description   : <no expression>
[error]Arguments     : LUA error: ...hadow of chernobyl\gamedata\scripts\xr_danger.script:84: attempt to index field 'actor' (a nil value)
 



any idea, how could it be fixed?