opcode error

[aberos]

I'm having to use opcode sending bytes, but is giving error .I'd whether and something that is missing in the function

error:

--[[ERROR: protected lua call failed: LUA ERROR:
/game_skills/skills.lua:77: attempt to index local 'msg' (a nil value)
stack traceback:
[C]: ?
/game_skills/skills.lua:77: in function </game_skills/skills.lua:76>
ERROR: protected lua call failed: LUA ERROR:
C++ call failed: InputMessage eof reached
stack traceback:
[C]: ?
[C]: in function 'getString'
/game_skills/skills.lua:77: in function 'callback'
/gamelib/protocolgame.lua:7: in function </gamelib/protocolgame.lua:4>
ERROR: protected lua call failed: LUA ERROR:
C++ call failed: InputMessage eof reached
stack traceback:
[C]: ?
[C]: in function 'getString'
/game_skills/skills.lua:77: in function 'callback'
/gamelib/protocolgame.lua:7: in function </gamelib/protocolgame.lua:
--]]

function server:

OPCODE_TESTE = 121

function testeCode(cid)
local msg = NetworkMessage.create()
msg:addString(getPlayerName(cid))
doSendPlayerExtendedOpcode(cid, OPCODE_TESTE, msg:getBuffer())
end

function otc:

ProtocolGame.registerOpcode(121, onTeste)
ProtocolGame.unregisterOpcode(121)

function onTeste(protocol, msg)
i = msg:getString()
print(i)
end

i'm using tfs 0.4

 

[aberos]

up!