DarkRP Printer / Upgradeable HELP please.

[nubstuff5]

So I want to create a printer for darkrp that is upgradeable, I am starting at the basic before
I satart making interfaces and buttons etc. so here is my code:

init.lua:
[LUA]-- RRPX Money Printer reworked for DarkRP by philxyz
AddCSLuaFile("cl_init.lua")
AddCSLuaFile("shared.lua")
include("shared.lua")

ENT.SeizeReward = 950

local PrintMore
local UpgradeDelay = 3
local PrinterLevel = 1
function ENT:Initialize()
self:SetModel("models/props_c17/consolebox01a.mdl")
self:PhysicsInit(SOLID_VPHYSICS)
self:SetMoveType(MOVETYPE_VPHYSICS)
self:SetSolid(SOLID_VPHYSICS)
local phys = self:GetPhysicsObject()
phys:Wake()
self.sparking = false
self.damage = 100
self.IsMoneyPrinter = true
timer.Simple(math.random(100, 350), function() PrintMore(self) end)
self.PrinterLevel = 1
end

function ENT:OnTakeDamage(dmg)
if self.burningup then return end

self.damage = (self.damage or 100) - dmg:GetDamage()
if self.damage <= 0 then
local rnd = math.random(1, 10)
if rnd < 3 then
self:BurstIntoFlames()
else
self:Destruct()
self:Remove()
end
end
end

function ENT:Destruct()
local vPoint = self:GetPos()
local effectdata = EffectData()
effectdata:SetStart(vPoint)
effectdata:SetOrigin(vPoint)
effectdata:SetScale(1)
util.Effect("Explosion", effectdata)
GAMEMODE:Notify(self:Getowning_ent(), 1, 4, "Your money printer has exploded!")
end

function ENT:BurstIntoFlames()
GAMEMODE:Notify(self:Getowning_ent(), 0, 4, "Your money printer is overheating!")
self.burningup = true
local burntime = math.random(8, 18)
self:Ignite(burntime, 0)
timer.Simple(burntime, function() self:Fireball() end)
end

function ENT:Fireball()
if not self:IsOnFire() then self.burningup = false return end
local dist = math.random(20, 280) -- Explosion radius
self:Destruct()
for k, v in pairs(ents.FindInSphere(self:GetPos(), dist)) do
if not v:IsPlayer() and not v:IsWeapon() and v:GetClass() ~= "predicted_viewmodel" and not v.IsMoneyPrinter then
v:Ignite(math.random(5, 22), 0)
elseif v:IsPlayer() then
local distance = v:GetPos():Distance(self:GetPos())
v:TakeDamage(distance / dist * 100, self, self)
end
end
self:Remove()
end

PrintMore = function(ent)
if not IsValid(ent) then return end

ent.sparking = true
timer.Simple(3, function()
if not IsValid(ent) then return end
ent:CreateMoneybag()
end)
end

function ENT:CreateMoneybag()
if not IsValid(self) or self:IsOnFire() then return end

local MoneyPos = self:GetPos()

if math.random(1, 22) == 3 then self:BurstIntoFlames() end

local amount = GAMEMODE.Config.mprintamount
if amount == 0 then
amount = 250
end

DarkRPCreateMoneyBag(Vector(MoneyPos.x + 15, MoneyPos.y, MoneyPos.z + 15), amount)
self.sparking = false
timer.Simple(math.random(100, 350), function() PrintMore(self) end)
end

local UpgradeCost = 5000 * self.PrinterLevel

function ENT:Use( activator, caller )
if !IsValid( activator ) then
return;
end

--if not CurTime() > (activator.NextUpgradeTime or 0) then
-- return
--end

if not activator:CanAfford(UpgradeCost) then
GAMEMODE:Notify(self:Getowning_ent(), 0, 4, "You cannot afford this.")
return
end

activator:AddMoney(-UpgradeCost)

activator.NextUpgradeTime = CurTime() + UpgradeDelay
end

function ENT:Think()

if self:WaterLevel() > 0 then
self:Destruct()
self:Remove()
return
end

if not self.sparking then return end

local effectdata = EffectData()
effectdata:SetOrigin(self:GetPos())
effectdata:SetMagnitude(1)
effectdata:SetScale(1)
effectdata:SetRadius(2)
util.Effect("Sparks", effectdata)
end
[/LUA]

Now my error is:

[ERROR] lua/entities/upgrade_money_printer/init.lua:100: attempt to index global 'self' (a nil value)
1. unknown - lua/entities/upgrade_money_printer/init.lua:100

Now this is occurring above the function "function ENT:Use( activator, caller )" at "local UpgradeCost = 5000 * self.PrinterLevel" (Line 100)

[Netheous]

That's because you are calling self and self is refering to entity.
If you are using it outside the function, it doesn't really know what self is.
Call it inside ENT:Initialize() function.

[nubstuff5]

[QUOTE=Netheous;40312409]That's because you are calling self and self is refering to entity.
If you are using it outside the function, it doesn't really know what self is.
Call it inside ENT:Initialize() function.[/QUOTE]

Man I just figured that DOOIII!

Thanks for your reply man I really appreciate it anyways.