I'm having trouble script someone can help me to solve the error

[pirulitopiu]

[24/09/2017 17:19:02] [Interface Error - TalkAction]
[24/09/2017 17:19:02] dados / talkactions / scripts / tpp.lua : eek:nSay
[24/09/2017 17:19:02] Descrição:
[24/09/2017 17:19:02] tenta indexar um valor nulo
[24/09/2017 17:19:02] rastreamento de pilha:
[24/09/2017 17:19:02] [C]: na função 'doSendMagicEffect'
[24/09/2017 17:19:02] dados / talkactions / scripts / tpp.lua: 6: na função <data / talkactions / scripts / tpp.lua: 1>

[24/09/2017 17:19:13] [Interface Error - TalkAction]
[24/09/2017 17:19:13] dados / talkactions / scripts / tpp.lua : eek:nSay
[24/09/2017 17:19:13] Descrição:
[24/09/2017 17:19:13] tenta indexar um valor nulo
[24/09/2017 17:19:13] rastreamento de pilha:
[24/09/2017 17:19:13] [C]: na função 'getThingfromPos'
[24/09/2017 17:19:13] dados / conversações / scripts / tpp.lua: 10: na função <data / talkactions / scripts / tpp.lua: 1>

function onSay(cid, words, param)
if words=="/opentp" then
local pos = {x=1026 , y=1031 , z=7} ---onde tp vai ser criado
local topos = {x=1036 , y=1042 , z=7} ---a position para onde sera teleportado
doCreateTeleport(1387, topos , pos)
doSendMagicEffect(createPos , math.random(0,0))
return true
end
if words=="/closetp" then
doRemoveItem(getThingfromPos(pos).uid,1)
return false
end

position = {x= 1036, y= 1042, z= 7} --A Position que todos os monsters iram nascer

local name = abra
local name1 = bulbasaur
local name2 = charmander

doSummonCreature(name, position)
doSummonCreature(name1, position)
doSummonCreature(name2, position)
return false
end

<talkaction log="yes" words="/opentp;/closetp" access="5" event="script" value="tpp.lua"/>

 

[Infernum]

doSendMagicEffect(createPos , math.random(0,0))
to
doSendMagicEffect(pos , CONST_ME_TELEPORT)