Lua Globalevent, Castle event

[Wezza]

The error;

[18/07/2014 10:00:00] Lua Script Error: [GlobalEvent Interface]
[18/07/2014 10:00:00] data/globalevents/scripts/castle.lua:onTimer

[18/07/2014 10:00:00] data/globalevents/scripts/castle.lua:43: attempt to concatenate a nil value
[18/07/2014 10:00:00] stack traceback:
[18/07/2014 10:00:00]     data/globalevents/scripts/castle.lua:43: in function <data/globalevents/scripts/castle.lua:42>
[18/07/2014 10:00:00] [Error - GlobalEvents::timer] Couldn't execute event: castle

The lua;

local kingPos = {x=797,y=619,z=4}
function onTimer()
    doBroadcastMessage("The Castle-gate is now open! " .. getCastleOwners() .. " will have to defend the castle in order to keep it! The conquerors have 30 minutes to enter the castle and kill the castle-king!", 22)
    doCleanTile(kingPos) -- if tile is blocked king dont spawn, remove all items including mwalls...
    local monster = doSummonCreature("The Castle-King", kingPos)
    setGlobalStorageValue(_STORAGES.GLOBAL.king, monster)
    openGate()
   
    return TRUE
end

 

[Wezza]

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[Hernest]

Post whole code.
Anyway it's trying to use variable which is empty.

 

[Wezza]

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