Erro na coldownbar.lua

bom glr eu tava adicionando o system de mega evolution por move e deu esse erro aq

[31/07/2018 18:40:11] [Error - MoveEvents Interface] 
[31/07/2018 18:40:11] data/lib/cooldown bar.lua
[31/07/2018 18:40:11] Description: 
[31/07/2018 18:40:11] (luaGetCreatureName) Creature not found

script da mega evo 

function getNewMoveTable(table, n)
    if table == nil then
        return false
    end
    local moves = {table.move1, table.move2, table.move3, table.move4, table.move5, table.move6, table.move7, table.move8, table.move9, table.move10, table.move11, table.move12}
    local returnValue = moves
    if n then
        returnValue = moves[n]
    end
    return returnValue
end
   local mEvolve
    if not getCreatureName(summon):find("Mega") and getItemAttribute(getPlayerSlotItem(cid, 8).uid, "megaStone") then
    if not isInArray(ret, "Mega Evolution,") then
        table.insert(ret, "Mega Evolution,")
        mEvolve = true
    end
end
if not mEvolve then
    table.insert(ret, "n/n,")
    end