Getting a rather odd error

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#1

Hello there! I’m AlphaEpsilon290. I edited More like rescripted an open-source chassis to make it play more nicely with NPCs that use the VehicleSeat ThrottleFloat and SteerFloat properties. Unfortunately, I get this error when using this file (250.1 KB)

Expected BasePart got Model for WeldConstraint:Part1
13:08:28.721 - Stack Begin
13:08:28.722 - Script 'Workspace.Chevy Caprice.VehicleSeat.ChassisMainEdited', Line 33
13:08:28.724 - Stack End

I’m using this chassis. If anyone could help me, that would be appreciated.

EDIT

Here's the code I think is being problematic: 
for i, Descendant in pairs(Car:GetDescendants()) do
	if Descendant:IsA("BasePart") then
		if Descendant:FindFirstAncestor("Body") then
			local Weld = Instance.new("WeldConstraint", Welds)
			Weld.Part0 = Descendant
			Weld.Part1 = CarEngine
		end
		if Descendant.Name == "Holder" and not Descendant:FindFirstAncestor("Body") then
			local Weld = Instance.new("WeldConstraint", Welds)
			Weld.Part0 = Descendant
			Weld.Part1 = CarEngine
		end
		if Descendant:FindFirstAncestor("Wheel") then
			local Wheel = Descendant:FindFirstAncestor("Wheel")
			local Weld = Instance.new("WeldConstraint", Welds)
			Weld.Part0 = Descendant
			Weld.Part1 = Wheel
			Wheel.Transparency = 1
			Descendant.Anchored = false
		end
	end
end
#2

So as the error states, you’re setting a weldConstraints Part1 to a Model. It has to be a BasePart. Perhaps you want to use Model.PrimaryPart, or an actual part inside the model.

#3

No, I filtered out any non-BaseParts with the Instance:IsA("BasePart") function.

#4

Not according to the statement. On line 29 write:

if Descendant:FindFirstAncestor("Wheel")
   local Wheel = Desendant:FindFirstAncestor("Wheel").PrimaryPart -- wheel is a model
end
#5

I’m sorry for disagreeing, but I beg to differ:
image

#6

What line is it on?
Weld.Part1 = CarEngine
or
Weld.Part1 = Wheel

#7

For some reason, Roblox Lua seems to think that I want to set a Weld’s PrimaryPart to a Model despite the fact that Wheel is a BasePart. Non-BaseParts are filtered out on line 18.

#8

Edit the code to check that the wheel is a BasePart because it says that’s the line that’s erroring. The Desendant has a check for that but not the wheel.

#9

No, the wheel variable is the parent of the descendant, so it is not filtered out. Have tried checking what descendant is?

#10

Thanks! Implementing a quick check in the script seems to have fixed the error.