Attempt to index nil with "PrimaryPart"

[Chaos_milo]

I get this error on the function:
Attempt to index nil with “PrimaryPart”

function Placement:CalcPlacementCFrame(model, position, rotation)
	local cf, size = self:CalcCanvas()

	local modelSize = CFrame.fromEulerAnglesYXZ(0, rotation, 0) * model.PrimaryPart.Size
	modelSize = Vector3.new(math.abs(modelSize.x), math.abs(modelSize.y), math.abs(modelSize.z))

	local lpos = cf:pointToObjectSpace(position);
	local size2 = (size - Vector2.new(modelSize.x, modelSize.z))/2
	local x = math.clamp(lpos.x, -size2.x, size2.x);
	local y = math.clamp(lpos.y, -size2.y, size2.y);

	local g = self.GridUnit
	if (g > 0) then
		x = math.sign(x)((math.abs(x) - math.abs(x) % g) + (size2.x % g))
		y = math.sign(y)((math.abs(y) - math.abs(y) % g) + (size2.y % g))
	end

	return cf * CFrame.new(x, y, -modelSize.y/2) * CFrame.Angles(-math.pi/2, rotation, 0)
end

I Used this placement system;

Creating A Furniture Placement System

This guide was originally written for scriptinghelpers . The original can be found here . One of the most common requests I get for blog post topics are for a decoration placement system that saves. I’ve shied away from this topic in the past as there is no singular “correct” way to do it. That being said, I think it’s a good exercise for all game devs to go through and will potentially place a role in a future blog post I plan to write. In addition to change things up, I’ll also take the ti…

[divernal8795 (Diver8795)]

You need to put the primary part from your model object in properties.

[HugeCoolboy2007 (omega)]

Actually, with this error, the issue is model is not defined

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@Chaos_milo how are you calling the function?

[Chaos_milo]

Fixed it, (Forgot to anchor the Part for the placement system)
Ugh.
Thanks Anyway!