Lua whats wrong with this script

[ares413]

local storage = 56486

function onDeath(cid, corpse, deathList)
    if isMonster(cid) then
        if getCreatureMaster(cid) ~= cid then
            doCreatureSetStorage(getCreatureMaster(cid), storageLol, os.time() + 10)
        end
    end
    return true
end

i keep getting this error

[18:40:36.467] [Error - CreatureScript Interface]
[18:40:36.468] data/creaturescripts/scripts/death.lua:onDeath
[18:40:36.468] Description:
[18:40:36.468] (luaDoCreatureSetStorage) Creature not found

please help rep++++!!!!!

 

[Summ]

Check if isCreature(getCreatureMaster(cid)) and getCreatureMaster(cid) ~= cid then
I don't know which tfs you are using but maybe getCreatureMaster(cid) just returns nil if it has no master..