Game.createMonster 1.0 error

[arthurluna]

How do I only one monster be summoned in a certain area?
it is checked if there is a monster in this particular area if you have not created another show again.

1. creature:getTile()
2. getCreaturePosition
3. getTopCreature(position)

function onAddItem(moveitem, tileitem, position)
local v = t[tileitem.itemid]
if(v and v.corpse == moveitem.itemid) then
    for x = v.fromPos.x, v.toPos.x do
        for y = v.fromPos.y, v.toPos.y do
            for z = v.fromPos.z, v.toPos.z do
                if(not isMonster(getTopCreature({x = x, y = y, z = z}).uid < v.boss)) then
                           doRemoveItem(moveitem.uid)
                           doSendMagicEffect(position, v.effect)
                    return Game.createMonster(v.boss, {x = math.random(v.fromPosition.x, v.toPosition.x), y = math.random(v.fromPosition.y, v.toPosition.y), z = 13})
                         end
                     end
                  end
             end
        end
    return true
end

 

[arthurluna]

SOLVED !