3d2dvgui gives error when removing entity

[MGSneaky]

hello,
im trying to make a 3d2d vgui which is attached to a prop, all is fine when i spawn the entity with the said 3d2dvgui code in it, but when i remove the entity it gives a null entity error.

I assume it is because the prop is gone so the pos is nil and it freaks out, but i have no idea how to make it stop rendering or whatever i need to do

heres my code
local sampleFrame = vgui.Create( "DFrame" )

sampleFrame:SetPos( 0, 0 )
sampleFrame:SetSize( 250, 250 )
sampleFrame:ParentToHUD()

hook.Add( "PostDrawOpaqueRenderables", "DrawDemoFrame", function()
vgui.Start3D2D( self:GetPos(), Angle(self:GetAngles()), 0.2 ) -- this line errors
sampleFrame:Paint3D2D()
vgui.End3D2D()
end )

end

function ENT:OnRemove()

sampleFrame:Close()

end

[Ricky Servietsky]

if not self:IsValid() then return end
vgui.Start3D2D( self:GetPos(), Angle(self:GetAngles()), 0.2 ) -- this line errors
self:Paint3D2D()
vgui.End3D2D()
Untested but it should works.
Good luck

[MGSneaky]

worked fine but self:Paint3D2D() had to be SampleFrame:Paint3D2D()

thanks!

[Ricky Servietsky]

Oh yeah forgot in that context self would be the object 'vgui', ^^'