Problem with bug report script

[MrDamiano]

Hi, I'm using tfs 0.3.6 and when I try to use a script on my server which should report some possible bugs on the server so I can read them in logs but I got a bug in a console:

[01/02/2014 00:30:41] [Error - TalkAction Interface]
[01/02/2014 00:30:41] data/talkactions/scripts/bug.lua:onSay
[01/02/2014 00:30:41] Description:
[01/02/2014 00:30:41] data/talkactions/scripts/bug.lua:4: attempt to call global 'checkExhausted' (a nil value)
[01/02/2014 00:30:41] stack traceback:
[01/02/2014 00:30:41]    data/talkactions/scripts/bug.lua:4: in function <data/talkactions/scripts/bug.lua:1>

and that's a script

function onSay(cid, words, param, channel)


if(not checkExhausted(cid, 714, 600)) then
    return true
end

    if(param == '') then
        return true
    end

local c = {
name_of_database = getConfigInfo('sqlDatabase'),
check_positions = "yes",
max_reports_per_day = 5,
days_reports_storage = 7326,
every_reports_storage = 7329,
}


local DZIEN = "" .. c.days_reports_storage .. "" ..os.date("%d") .. "" .. os.date("%m") ..""

        if getPlayerStorageValue(cid, c.days_reports_storage) == -1 then
            setPlayerStorageValue(cid, c.days_reports_storage, 1)
        end
        if getPlayerStorageValue(cid, c.every_reports_storage) == -1 then
            setPlayerStorageValue(cid, c.every_reports_storage, 1)
        end

       
local how_many_reports_send_today = getPlayerStorageValue(cid, c.days_reports_storage)
local every_reports = getPlayerStorageValue(cid, c.every_reports_storage)
local how_many_reports_can_player_send_per_day = getConfigInfo('avivable_reports_per_day') - how_many_reports_send_today

if how_many_reports_send_today < getConfigInfo('avivable_reports_per_day') then
        if c.check_positions ~= "no" then
            pos = getPlayerPosition(cid)
            player_position = " [X: "..pos.x.." | Y: "..pos.y.." | Z: "..pos.z.."] "
        else
            player_position = "."
        end
           
       
        local what_date_is_today = os.date("%a %b %d %X %Y")
        if getConfigValue('where_going_reports') == "db.executeQuery" then
        db.executeQuery("INSERT INTO  `" .. c.name_of_database .."`.`bugs`(`data` ,`player_name` ,`player_position` ,`report_description`, `status`, `show_on_web`) VALUES ('" .. what_date_is_today .. "',  '" .. getPlayerName(cid) .. "',  '" .. player_position .. "',  '" .. param .. "', 'waiting', 'no');")   
        how_many_reports_send_todayM = how_many_reports_send_today + 1
        setPlayerStorageValue(cid, c.days_reports_storage, how_many_reports_send_today + 1)
        setPlayerStorageValue(cid, c.every_reports_storage, every_reports + 1)
       
       
        elseif getConfigValue('where_going_reports') == "db.query" then
        db.query("INSERT INTO  `" .. c.name_of_database .."`.`bugs`(`data` ,`player_name` ,`player_position` ,`report_description`, `status`, `show_on_web`) VALUES ('" .. what_date_is_today .. "',  '" .. getPlayerName(cid) .. "',  '" .. player_position .. "',  '" .. param .. "', 'waiting', 'no');")   
        how_many_reports_send_todayM = how_many_reports_send_today + 1
        setPlayerStorageValue(cid, c.days_reports_storage, how_many_reports_send_today + 1)
        setPlayerStorageValue(cid, c.every_reports_storage, every_reports + 1)

     

        elseif getConfigValue('where_going_reports') == "log" then
        f = assert(io.open("./data/logs/bug.txt", "a+"))
        f = io.open("./data/logs/bug.txt", "a+")
        f:write("\n " .. what_date_is_today .." [" .. getPlayerName(cid) .. "]" .. player_position .. ": " .. param .. "")
        f:close()
       
        how_many_reports_send_todayM = how_many_reports_send_today + 1
        setPlayerStorageValue(cid, c.days_reports_storage, how_many_reports_send_today + 1)
        setPlayerStorageValue(cid, c.every_reports_storage, every_reports + 1)
       
       
        end
        doPlayerSendTextMessage(cid, MESSAGE_EVENT_DEFAULT, "Your report has been sent to " .. getConfigValue('serverName') .. ". It's your " .. every_reports  .. ", and you can sent " .. how_many_reports_can_player_send_per_day .." reports this day.")
        doPlayerSendTextMessage(cid, 19,"ZGLOSILES BUGA. DZIEKUJEMY! ZOSTANIE ON ODCZYTANY I POPRAWIONY PRZEZ ADMINISTRATORA SERWERA.")
else
doPlayerSendTextMessage(cid, MESSAGE_EVENT_DEFAULT, "You can't report more bugs this day")
end
    return true
end

Did anyone know to fix that? thanks