The Parent property of _ is locked, current parent: NULL, new parent _

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#1

Hi, i am making a spring constraint attach from a player to wherever the mouse is looking at, then destroying itself when the mouse button is let go. it works, except it only works one time, then it gives me this weird error:

The Parent property of SpringConstraint is locked, current parent: NULL, new parent -My user-

Any help? Heres the code:

local Rope = Instance.new("SpringConstraint")

game.ReplicatedStorage.CreatePart.OnServerEvent:Connect(function(player, part, mousepos, isholdingdown)	
	if isholdingdown == false then
		Rope:Destroy()
	elseif isholdingdown == true then
		local A0 = Instance.new('Attachment')
		local A1 = Instance.new('Attachment')
		A0.Parent = workspace.Terrain
		A0.WorldPosition = mousepos
		A1.Parent = player.Character.HumanoidRootPart
		Rope.Attachment0 = A0
		Rope.Attachment1 = A1
		Rope.Parent = player.Character --Error on this line
		Rope.Visible = true
		Rope.LimitsEnabled = true
		Rope.Coils = 0
		Rope.Thickness = 0.1
		Rope.Color = BrickColor.new("Institutional white")
		Rope.MaxLength = (player.Character.HumanoidRootPart.Position - part.Position).Magnitude
		local BV = Instance.new('BodyVelocity')
		local char = player.Character
		char:WaitForChild("Humanoid"):GetPropertyChangedSignal("MoveDirection"):Connect(function()
			BV.Velocity = player.Character.Humanoid.MoveDirection * 26
			BV.MaxForce = Vector3.new(1000000,0,1000000)
		end)
		BV.Parent = char.HumanoidRootPart
	end
end)
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#2

I assume it’s cause you’re deleting the rope and never replacing it, this will probably break your script even when you fix this error
Anyway, this should fix it, I think.

if isholdingdown == false and Rope.Parent then
		Rope:Destroy()

edit: you’ll also have to also make a new Rope springconstraint whenever they do enable it

2 Likes
#3

Still gives the same error. Heres the script you modified and see if I am doing it wrong. Im not sure:

local Rope = Instance.new("SpringConstraint")

game.ReplicatedStorage.CreatePart.OnServerEvent:Connect(function(player, part, mousepos, isholdingdown)
	if isholdingdown == false and Rope.Parent then
		Rope:Destroy()
		return
	elseif isholdingdown == true then
		local A0 = Instance.new('Attachment')
		local A1 = Instance.new('Attachment')
		A0.Parent = workspace.Terrain
		A0.WorldPosition = mousepos
		A1.Parent = player.Character.HumanoidRootPart
		Rope.Attachment0 = A0
		Rope.Attachment1 = A1
		Rope.Parent = player.Character
		Rope.Visible = true
		Rope.LimitsEnabled = true
		Rope.Coils = 0
		Rope.Thickness = 0.1
		Rope.Color = BrickColor.new("Institutional white")
		Rope.MaxLength = (player.Character.HumanoidRootPart.Position - part.Position).Magnitude
		local BV = Instance.new('BodyVelocity')
		local char = player.Character
		char:WaitForChild("Humanoid"):GetPropertyChangedSignal("MoveDirection"):Connect(function()
			BV.Velocity = player.Character.Humanoid.MoveDirection * 26
			BV.MaxForce = Vector3.new(1000000,0,1000000)
		end)
		BV.Parent = char.HumanoidRootPart
	end
end)
1 Like
#4

This seems to work for me in studio

local Rope = Instance.new("SpringConstraint")

game.ReplicatedStorage.CreatePart.OnServerEvent:Connect(function(player, part, mousepos, isholdingdown)	
	if isholdingdown == false then
		Rope:Destroy()
	elseif isholdingdown == true then
		local A0 = Instance.new('Attachment')
		local A1 = Instance.new('Attachment')
		A0.Parent = workspace.Terrain
		A0.WorldPosition = mousepos
		A1.Parent = player.Character.HumanoidRootPart
		
		Rope = Instance.new("SpringConstraint")
		
		Rope.Attachment0 = A0
		Rope.Attachment1 = A1
		Rope.Parent = player.Character --Error on this line
		Rope.Visible = true
		Rope.LimitsEnabled = true
		Rope.Coils = 0
		Rope.Thickness = 0.1
		Rope.Color = BrickColor.new("Institutional white")
		Rope.MaxLength = (player.Character.HumanoidRootPart.Position - part.Position).Magnitude
		local BV = Instance.new('BodyVelocity')
		local char = player.Character
		char:WaitForChild("Humanoid"):GetPropertyChangedSignal("MoveDirection"):Connect(function()
			BV.Velocity = player.Character.Humanoid.MoveDirection * 26
			BV.MaxForce = Vector3.new(1000000,0,1000000)
		end)
		BV.Parent = char.HumanoidRootPart
	end
end)

I made my edit obvious so you know what I did

2 Likes
#5

thanks so much for helping me :smiley:

2 Likes
#6

no problem, have a nice day
I used an old version of your script for my test, so you may want to add the return thing again

3 Likes