ajuda comando restart

Salve tibianos,

alguem pode me ajudar a executer esse comando /restart ?

ele ta dando esse erro

function onSay(cid, words, param)

local minid = 3

local restartTime = 1000*60*5

local message = "O Servidor sera reiniciado em 5 Minutos, Aconselho que fiquem em area protegida e reloguem em seguida!"

local messageStop = "O Comandos de Restart foi cancelado!"

if getPlayerGroupId(cid) >= minid then

if param == "now" then

saveAndRestart(cid)

elseif param == "stop" then

broadcastMessage(messageStop)

stopEvent(saverestart)

else

broadcastMessage(message)

saverestart = addEvent(saveAndRestart, restartTime, cid)

end

end

end

function returnDate()

curdate = os.date("*t")

if curdate.day < 10 then

curdate.day = "0"..curdate.day

end

if curdate.month < 10 then

curdate.month = "0"..curdate.month

end

if curdate.hour < 10 then

curdate.hour = "0"..curdate.hour

end

if curdate.min < 10 then

curdate.min = "0"..curdate.min

end

return curdate

end

function saveAndRestart(cid)

file = io.open("data/logs/restarts.txt", "r")

if file == nil then

file = io.open("data/logs/restarts.txt", "w")

end

text = file:read()

if text == nil then

text = ""

end

file:close()

curdate = returnDate()

newdate = "["..curdate.day.."/"..curdate.month.."/"..curdate.year.." "..curdate.hour..":"..curdate.min.."]"

newtext = text..newdate.."Server restarted by "..getPlayerName(cid).."\n"

file = io.open("data/logs/restarts.txt", "w")

file:write(newtext)

file:close()

savePlayers()

io.popen("LuaRestarter.exe")

end