Syserr

[.Fr3zy94™]

Hi i got this error on 34083:

PHP Code:

SYSERR: Jan 22 13:05:13 :: RunState: LUA_ERROR: [string "magazin_fierar"]:2: attempt to index global `npc' (a number value)
SYSERR: Jan 22 13:05:13 :: WriteRunningStateToSyserr: LUA_ERROR: quest magazin_fierar.start letter 


And this is the quest:

PHP Code:

quest magazin_fierar begin
    state start begin
        when 20016.chat."Iteme fara +" begin    
            setskin(NOWINDOW)
            npc.open_shop(13)
        end
        when 20016.chat."Item fara +2" begin
            setskin(NOWINDOW)    
            npc.open_shop(14)
        end
        when 20016.chat."Item cu +" begin
            setskin(NOWINDOW)    
            npc.open_shop(12)
        end
    end
end 


Can anyone explain me this syserr or help me to fix it?