Variable value nil in custom entity function

[kPkPT]

Hey guys,
So i created a function inside my custom entity wich is ENT:DrawScreen() and there is a variable inside the entity lua wich is tdui and if i call for that variable inside for example ENT:Draw() it will return the value defined for that variable. However in ENT:DrawScreen() it always returns nil. Here's the code:

tdui = include("tdui.lua")
function ENT:DrawScreen()

    if(self.draw) then
        self.Panel = self.Panel or tdui.Create() -- tdui returns nil
        local offsetx = -640;
        local offsety = -935.5;
        self.Panel:Rect(offsetx, offsety, 1280, 720, Color(33,33,33), Color(33, 33, 33))

        self.Panel:Cursor()
        self.Panel:SetIgnoreZ(false)
        self.Panel:Render(self:GetPos() + self:GetAngles():Forward() * -1.7, self:GetAngles(), 0.0222)
    end

end

Could any of you please help me?

[Trackster]

your function never returns anything

[kPkPT]

I dont mean tdui as a return of the function, but when the function is using it it returns nil. When i am calling tdui inside the function its value is nil for some reason

[kPkPT]

Anyone please help?