Car shop error

[Hondaz]

[ERROR] lua/npcshop/gui.lua:57: attempt to index local 'parent' (a nil value)
1. unknown - lua/npcshop/gui.lua:57

how can i fix this

[lua]

surface.CreateFont("npcshop_large", {
font = "Tahoma",
size = 20,
weight = 600,
antialias = true
})
surface.CreateFont("npcshop_small", {
font = "Tahoma",
size = 12,
weight = 600,
antialias = true
})

local function IsPlyVIP()
local isvip = false
for k,v in pairs(NPCSHOP.UserGroups) do
if LocalPlayer():GetUserGroup() == v then
isvip = true
break
end
end
return isvip
end

BUTTONTYPE_PURCHASE = 1
BUTTONTYPE_SPAWN = 2
local frame, pnllist

surface.SetFont("DermaDefault")
local txtw, txth = surface.GetTextSize("VIP")
txtw = 64 - txtw/2
txth = 10 - txth/2
local function AddVehicle(name, model, price, class, viponly, jobs)
local pnl = vgui.Create("DPanel")
pnl:SetTall(138)
pnl.items = {}
pnl.vehclass = class

local icon = vgui.Create("DModelPanel", pnl)
icon:SetSize(128, 128)
icon:SetPos(5, 5)
icon:SetModel(model)
//icon:SetDirectionalLight(BOX_TOP, Color(100, 0, 255))
icon:SetCamPos( Vector( 140, 140, 100 ) )
icon:SetLookAt( Vector( 0, 0, 60 ) )
icon.hovered = false
icon.speed = 0
icon.isvip = viponly
local paint = icon.Paint
icon.Paint = function(self)
surface.SetDrawColor(Color(0, 0, 0, 255))
//surface.DrawRect(-2, -2, 132, 130)
local x,y = self:LocalToScreen(0, 0)
local parent = self:GetParent():GetParent():GetParent()
local _,py = parent:LocalToScreen(0,0)
local pytall = py + parent:GetTall()

render.SetScissorRect(x, py, x + 128, y + math.max(pytall-y, 0), true)
paint(self)
render.SetScissorRect(0,0,0,0,false)

if self.isvip then
surface.SetDrawColor(Color(255, 215, 0, 255))
surface.DrawRect(0, 0, 128, 20)

surface.SetTextColor(Color(0,0,0,255))
surface.SetFont("DermaDefault")
surface.SetTextPos(txtw, txth)
surface.DrawText("VIP")
end
end
icon.OnCursorEntered = function(self) self.hovered = true end
icon.OnCursorExited = function(self) self.hovered = false end
icon.LayoutEntity = function(self, ent)
if self.hovered then
self.speed = math.min(self.speed + 0.05, 1)
else
self.speed = math.max(self.speed - 0.01, 0)
end
ent:SetAngles( ent:GetAngles() + Angle(0, self.speed, 0) )
end
pnl.items.icon = icon

local wide = pnl:GetWide()
local half = (wide - 128)/2

surface.SetFont("npcshop_large")
local headlblw, npcshoplargeh = surface.GetTextSize(name)
headlblw = (half - headlblw/2) + 128

local headlbl = vgui.Create("DLabel", pnl)
headlbl:SetPos(headlblw, 5)
headlbl:SetFont("npcshop_large")
headlbl:SetColor(Color(50,50,50,255))
headlbl:SetText(name)
headlbl:SizeToContents()
headlbl.txt = name
pnl.items.headlbl = headlbl

local pricelbl = vgui.Create("DLabel", pnl)
pricelbl:SetPos(133, 50)
pricelbl:SetText("Price: "..price)
pricelbl:SetFont("npcshop_large")
pricelbl:SetColor(Color(50,50,50,255))
pricelbl:SizeToContents()
pnl.items.pricelbl = pricelbl

if #jobs > 0 then
local jobsstring = ""
for _,job in ipairs(jobs) do
jobsstring = jobsstring .. team.GetName(job) .. ", "
end
jobsstring = string.sub(jobsstring, 1, -3)
local jobslbl = vgui.Create("DLabel", pnl)
jobslbl:SetPos(133, 50 + npcshoplargeh + 5)
jobslbl:SetText("Jobs: "..jobsstring)
jobslbl:SetFont("npcshop_large")
jobslbl:SetColor(Color(50,50,50,255))
jobslbl:SizeToContents()
//pnl.items.jobslbl = jobslbl
end

local okbtn = vgui.Create("DButton", pnl)
okbtn:SetText("Purchase")
okbtn:SetSize(wide - 143, 30)
okbtn:SetFont("npcshop_large")
okbtn:SetPos(138, 103)
okbtn.btntype = BUTTONTYPE_PURCHASE
okbtn.DoClick = function(self)
if self.btntype == BUTTONTYPE_PURCHASE then
Derma_Query("Are you sure you want to buy '"..name.."'?", "You sure?", "Yes!",
function()
RunConsoleCommand("_npcshopbtnclick", class)
end)
else
RunConsoleCommand("_npcshopbtnclick", class)
self:GetParent():GetParent():GetParent():GetParent():Close() // i hate my life
end
end
//print("IsPlyVIP?"..tostring(IsPlyVIP()))
if not IsPlyVIP() and viponly then
okbtn:SetDisabled(true)
end
pnl.items.okbtn = okbtn

pnllist:AddItem(pnl)
end

local function CreateFrame()
frame = vgui.Create("DFrame")
frame:SetSize(600, 1000)
frame:Center()
frame:SetDeleteOnClose(false)
frame:ShowCloseButton(true)
frame:SetSizable(true)
frame:SetDraggable(true)
frame:SetTitle("NPC Vehicle Shop")
frame:MakePopup()
frame:DockPadding(5, 48, 5, 5)
frame:SetMinWidth( 220 )
frame:SetMinHeight( 200 )

local lbl = vgui.Create("DLabel", frame)
lbl:SetText("Hello, how can I help you?")
lbl:SetPos(5, 28)
lbl:SizeToContents()

pnllist = vgui.Create("DPanelList", frame)
pnllist:Dock(FILL)
pnllist:EnableVerticalScrollbar(true)
pnllist.Paint = function(self, w, h)
draw.RoundedBox(6, 0, 0, w, h, Color(150, 150, 150, 255))
end
pnllist:SetSpacing(10)

local perf = pnllist.PerformLayout
pnllist.PerformLayout = function(self)
perf(self)

local wide = self:GetWide()
local half = (wide - 128)/2
surface.SetFont("DermaDefault")

for k,v in pairs(self:GetItems()) do
local headlblw = surface.GetTextSize(v.items.headlbl.txt)
headlblw = half - headlblw/2 + 128
v.items.headlbl:SetPos(headlblw, 5)

v.items.okbtn:SetSize(wide - 143, 30)
end
end

for _,v in pairs(NPCSHOP.Vehicles) do
AddVehicle(v.name, v.model, v.price, v.class, v.viponly, v.job)
end
end
local function UpdateFrame()
for k,v in pairs(pnllist:GetItems()) do
if LocalPlayer():OwnsVehicle(v.vehclass) then
v.items.okbtn:SetText("Deploy")
v.items.okbtn.btntype = BUTTONTYPE_SPAWN
else
v.items.okbtn:SetText("Purchase")
v.items.okbtn.btntype = BUTTONTYPE_PURCHASE
end

//print("IsPlyVIP?"..tostring(IsPlyVIP()))
if not IsPlyVIP() and v.items.icon.isvip then
v.items.okbtn:SetDisabled(true)
else
v.items.okbtn:SetDisabled(false)
end
end
end
local function OpenMenu()
if not frame then
CreateFrame()
UpdateFrame()
else
UpdateFrame()
frame:SetVisible(true)
end
end
usermessage.Hook("npcshop_openmenu", OpenMenu)

usermessage.Hook("_updatenpcshopgui", function( um )
local class = um:ReadString()

for k,v in pairs(pnllist:GetItems()) do
if v.vehclass == class then
v.items.okbtn:SetText("Deploy")
v.items.okbtn.btntype = BUTTONTYPE_SPAWN
end
end
end)
[/lua]

[highlight](User was banned for this post ("wrong section" - Gran PC))[/highlight]