script de boost com erro

Postado Agosto 2, 2014 10 anos

gente ta dando esse erro, sera que algum de vcs sabem solucionar?

[02/08/2014 14:22:11] [Error - Action Interface]
[02/08/2014 14:22:11] data/actions/scripts/booststone.lua:onUse
[02/08/2014 14:22:11] Description:
[02/08/2014 14:22:11] data/actions/scripts/booststone.lua:21: attempt to perform arithmetic on a nil value
[02/08/2014 14:22:11] stack traceback:
[02/08/2014 14:22:11] data/actions/scripts/booststone.lua:21: in function <data/actions/scripts/booststone.lua:1>

esse é o script

    function onUse(cid, item, topos, item2, frompos)
    local myball = getPlayerSlotItem(cid, 8)
    local boost = getItemAttribute(myball.uid, "boost") or 0
    local boosts = 0
    if boost == 50 then
    return doPlayerSendCancel(cid, "Sorry, is not possible.")
    end

    if #getCreatureSummons(cid) >= 1 then
    if getPlayerAccess(cid) == 6 then
    boosts = 10
    end
    boosts = boosts + 1
    local pokemon = getItemAttribute(myball.uid, "poke")
    local off = pokes[pokemon].offense * boost_rate * boosts
    local def = pokes[pokemon].defense * boost_rate * boosts
    local agi = pokes[pokemon].agility * boosts
    local spatk = pokes[pokemon].specialattack * boost_rate * boosts
    local vit = pokes[pokemon].vitality * boost_rate * boosts
    doSetItemAttribute(myball.uid, "boost", boost + boosts)
    doItemSetAttribute(myball.uid, "offense", getItemAttribute(myball.uid, "offense") + off)
    doItemSetAttribute(myball.uid, "defense", getItemAttribute(myball.uid, "defense") + def)
    doItemSetAttribute(myball.uid, "speed", getItemAttribute(myball.uid, "speed") + agi)
    doItemSetAttribute(myball.uid, "specialattack", getItemAttribute(myball.uid, "specialattack") + spatk)
    doItemSetAttribute(myball.uid, "vitality", getItemAttribute(myball.uid, "vitality") + vit)
    doRemoveItem(item.uid)
    doSendMagicEffect(getThingPos(item2.uid), 40)
    doPlayerSendTextMessage(cid, 27, "Congrulations, your "..pokemon..", as beem boosted +1.")
    doPlayerSendTextMessage(cid, 27, "Now your "..pokemon.." have a boost +"..boosts + boost..".")
    doSendAnimatedText(getThingPos(item2.uid), "BOOST!", 71)
    doPlayerSetVocation(cid,4)
    else
    return doPlayerSendCancel(cid, "Only use in yours pokemons.")
    end
    return true
    end