failed to create the VGUI component (DImage)

[Thegerba]

So, I'm working with DImage as you can probably tell, and I tried to store 20 different DImage frames on a table which brought no errors, except the message ONLY ONE TIME WHEN I FIRST START A SINGLE PLAYER GAME

failed to create the VGUI component (DImage)

I'd think it was because it was in a table, however if i open the code in my autorun folder and save it, it creates all 20 images and works perfectly as intended.

Screenshot of it working as it should AFTER re running the code
[img]http://i.imgur.com/K81hWSG.jpg[/img]

Code:

local ply, health, armor, containers, pieces, GTH, prevPos
local a, b, c
local seconds = 0 
local function SetHearts()
	heart_slots = {}
	heart_slots[1] = vgui.Create("DImage")
	heart_slots[2] = vgui.Create("DImage")
	heart_slots[3] = vgui.Create("DImage")
	heart_slots[4] = vgui.Create("DImage")
	heart_slots[5] = vgui.Create("DImage")
	heart_slots[6] = vgui.Create("DImage")
	heart_slots[7] = vgui.Create("DImage")
	heart_slots[8] = vgui.Create("DImage")
	heart_slots[9] = vgui.Create("DImage")
	heart_slots[10] = vgui.Create("DImage")
	heart_slots[11] = vgui.Create("DImage")
	heart_slots[12] = vgui.Create("DImage")
	heart_slots[13] = vgui.Create("DImage")
	heart_slots[14] = vgui.Create("DImage")
	heart_slots[15] = vgui.Create("DImage")
	heart_slots[16] = vgui.Create("DImage")
	heart_slots[17] = vgui.Create("DImage")
	heart_slots[18] = vgui.Create("DImage")
	heart_slots[19] = vgui.Create("DImage")
	heart_slots[20] = vgui.Create("DImage")
end 
SetHearts()

ply = LocalPlayer()

for k, i in pairs(heart_slots) do
	i:SetImage("vgui/heartcontainers/container_1.png")
	i:SetSize(ScrW() / 55, ScrW() / 55 - 5)
	if k == 1  then 
		prevPos = ScrW() / 55
		i:SetPos( ScrW() / 40, ScrH() / 40 )
	elseif k > 11 then 
		i:SetPos( prevPos + ScrW() / 40, ScrH() / 40 * 2 )
		prevPos = prevPos + ScrW() / 55
	elseif k == 11 then 
		prevPos = ScrW() / 55
		i:SetPos( ScrW() / 40, ScrH() / 40 * 2 )
	else 
		i:SetPos( prevPos + ScrW() / 40, ScrH() / 40)
		prevPos = prevPos + ScrW() / 55
	end 
	
end

So just to tl;dr

When i first start it doesnt work
When i re run the code ingame it does

[MysteryPancake]

This is a common problem caused by the code being run before everything gets initialized. You have to run it a bit later using one of the many initialization hooks. Also, it's probably a better idea to use HUDPaint and DrawTexturedRect instead

[editline]18th March 2017[/editline]

local heartmat = Material( "vgui/heartcontainers/container_1.png" )
local prevpos = 0

hook.Add( "HUDPaint", "DrawHearts", function()

	surface.SetDrawColor( 255, 255, 255, 255 )
	surface.SetMaterial( heartmat )

	local size = ScrW() / 55

	for k = 1, 20 do
		if k == 1 then
			prevPos = ScrW() / 55
			surface.DrawTexturedRect( ScrW() / 40, ScrH() / 40, size, size - 5 )
		elseif k > 11 then
			surface.DrawTexturedRect( prevPos + ScrW() / 40, ScrH() / 40 * 2, size, size - 5 )
			prevPos = prevPos + ScrW() / 55
		elseif k == 11 then 
			prevPos = ScrW() / 55
			surface.DrawTexturedRect( ScrW() / 40, ScrH() / 40 * 2, size, size - 5 )
		else 
			surface.DrawTexturedRect( prevPos + ScrW() / 40, ScrH() / 40, size, size - 5 )
			prevPos = prevPos + ScrW() / 55
		end
	end

	prevpos = 0 -- reset it
	
end )

[editline]18th March 2017[/editline]

^ This code is untested but is a bit cleaner and doesn't create a ton of vgui elements unnecessarily and should work without errors (hopefully)

[editline]18th March 2017[/editline]

Also, don't forget you can always multiply a number by k instead of adding to prevPos

[Thegerba]

Worked like a charm, Thanks a bunch.

Also I'm kinda mad I didn't think of that, beforehand considering while waiting for a response i finished coding it, and it's a lot more complicated looking