Create txt-file error

Hey guys,

I started making some simple addons just to get used to Lua and how it works with ESO.

Today I wanted to create a .txt-File and add some lines of text but I always get an UI Error saying "attempt to index a nil value" when it fires EVENT_POWER_UPDATE (eg. when I start running). The errormessage says its in the line 46

local file = io.open('dpstest.txt', "w")

Here is the source code:

DpsRace = {}
DpsRace.name = "DpsRace"
 
--
--
 
function DpsRace:OnAddOnLoad()
    if addonName == DpsRace.name then
        DpsRace:Initialize()
    end
end
 
--
--
 
function DpsRace:Initialize()
 d("test")
end
 
--
--
 
function DpsRace:GetSkill(eventCode, result, isError, abilityName, abilityGraphic, abilityActionSlotType, sourceName, sourceType, targetName, targetType, hitValue, powerType, damageType, log)
    d(eventCode)
    d(result)
    d(isError)
    d(abilityName)
    d(abilityGraphic)
    d(abilityActionSlotType)
    d(sourceName)
    d(sourceType)
    d(targetName)
    d(targetType)
    d(hitValue)
    d(hitValue)
    d(powerType)
    d(damageType)
    d(log)
end
 
 
--
--
 
function DpsRace:CreateFile()
    local file = io.open('dpstest.txt', "w")
    file:write("Test")
    file:close()
 
end
 
--
--
 
 
 
EVENT_MANAGER:RegisterForEvent(DpsRace.name, EVENT_ADD_ON_LOADED, DpsRace.OnAddOnLoad)
EVENT_MANAGER:RegisterForEvent(DpsRace.name, EVENT_COMBAT_EVENT, DpsRace.GetSkill)
EVENT_MANAGER:RegisterForEvent(DpsRace.name, EVENT_POWER_UPDATE, DpsRace.CreateFile)

Does anybody know what is wrong here?

Question No.2: Why isn't "test" displayed in the chat window when Initializing?


Thanks in advance for you help

[Garkin]

A1: ESO does not support io library, you can't read from or write to disk.
EDIT: Actually the only way how to read/write to disk are saved variables defined in the addon manifest (.txt file). And may be I can mention chat log ( SetChatLogEnabled(true) ).

A2: Because chat system is initialized later then your addon is loaded. If you want to display "test" message, call d("test") from the EVENT_PLAYER_ACTIVATED handler.

thank you very much for your fast and precise response. :-)