error with script, wats it mean? :O

[Slain]

I am getting a console error and dont know how to fix it :/

[26/08/2009 22:10:40] Lua Script Error: [Action Interface]
[26/08/2009 22:10:40] in a timer event called from:
[26/08/2009 22:10:41] data/actions/scripts/quests/inq lever4.luanUse

[26/08/2009 22:10:41] data/actions/scripts/quests/inq lever4.lua:3: attempt to index global 'item' (a nil value)
[26/08/2009 22:10:41] stack traceback:
[26/08/2009 22:10:41] data/actions/scripts/quests/inq lever4.lua:3: in function <data/actions/scripts/quests/inq lever4.lua:1>

Here is the script.

local function back(params)
doCreateItem(params.wallid, 1, params.wallpos)
doTransformItem(params.laver, item.itemid - 1)
end

function onUse(cid, item, fromPosition, itemEx, toPosition)
local corpsePos = {x=507,y=339,z=13,stackpos=1}
local corpse = getThingFromPos(corpsePos)
local corpseId = 5527

local wallPos = {x=505,y=340,z=13,stackpos=1}
local wall = getThingFromPos(wallPos)
local wallId = 1050

local time = 10

if (item.itemid == 1945 and corpse.itemid == corpseId and wall.itemid == wallId) then
doRemoveItem(corpse.uid, 1)
doRemoveItem(wall.uid, 1)
doTransformItem(item.uid, item.itemid + 1)
doPlayerSendTextMessage(cid,22,"You have three minutes to go through the portal before the wall closes!")
addEvent(back, time * 60 * 1000, {wallid = wallId, wallpos = wallPos, laver = item.uid})
elseif item.uid == 15014 and item.itemid == 1946 then
doTransformItem(item.uid,item.itemid-1)
end
return true
end

 

[DarkstaR]

It means the variable item has a nil (non-existant) value.


Look at your code

local function back(params)
doCreateItem(params.wallid, 1, params.wallpos)
doTransformItem(params.laver, [B][I][U]item[/U][/I][/B].itemid - 1)
end

Were do you see Item declared in that function? No where, yet your passing it as an arg. Case closed.

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[Gut]

If you don't understand what he meant, replace:

doTransformItem(params.laver, item.itemid - 1)

with

doTransformItem(params.laver.uid, params.laver.itemid - 1)


EDIT:

You're going to also have to change your input parameters to input the item instead of just the UID.

(addEvent(back, time * 60 * 1000, {wallid = wallId, wallpos = wallPos, laver = item}))

 

[Slain]

If you don't understand what he meant, replace:

doTransformItem(params.laver, item.itemid - 1)

with

doTransformItem(params.laver.uid, params.laver.itemid - 1)


EDIT:

You're going to also have to change your input parameters to input the item instead of just the UID.

(addEvent(back, time * 60 * 1000, {wallid = wallId, wallpos = wallPos, laver = item}))

ty gut