"Attempt to index nil with FindFirstChild"

Help and Feedback Scripting Support
,
#1

I am having some issues with my gun, I use a few systems to take the damage to make sure if they hit the character’s accessory then it still damages them. I have looked at other posts, but none of them work in this context. This is the code source:

script.Parent.Fire.OnServerEvent:Connect(function(player, mousePos)
if script.Parent.Ammo.Value > 0 then
	script.Parent.ReloadServer.Disabled = true
	script.Parent.Ammo.Value = script.Parent.Ammo.Value - 1
	local Head = player.Character.Head.Position
	local FromP = script.Parent.Tip.Position
	local ToP = mousePos
	local RayCast = Ray.new(Head, (ToP - Head).unit*1000)
	local Part, Position = game.Workspace:FindPartOnRay(RayCast, player.Character, false, true)
	if Part then
		if Part.Parent:FindFirstChild("Humanoid") then
			Part.Parent.Humanoid:TakeDamage(26)
		elseif Part.Parent.Parent:FindFirstChild("Humanoid") then
			Part.Parent.Parent.Humanoid:TakeDamage(26)
		elseif Part.Parent.Parent.Parent:FindFirstChild("Humanoid") then
			Part.Parent.Parent.Parent.Humanoid:TakeDamage(26)
		elseif Part.Parent.Parent.Parent.Parent:FindFirstChild("Humanoid") then
			Part.Parent.Parent.Parent.Parent.Humanoid:TakeDamage(26)
		end
	end
	local visualBullet = Instance.new("Part")
	visualBullet.Parent = game.Workspace
	visualBullet.CanCollide = false
	visualBullet.Anchored = true
	local Dist = (ToP - FromP).magnitude
	visualBullet.CFrame = CFrame.new(FromP,Position)*CFrame.new(0,0,-Dist/2)
	visualBullet.Size = Vector3.new(0.3,0.3,Dist)
	visualBullet.Material = Enum.Material.Neon
	visualBullet.Color = Color3.fromRGB(255, 239, 114)
	visualBullet.Name = "GunBullet"
	script.Parent.Tip.Flash.Enabled = true
	script.Parent.Handle.Fired:Play()
	wait(0.04)
	visualBullet:Destroy()
	script.Parent.Tip.Flash.Enabled = false
	script.Parent.ReloadServer.Disabled = false
end

end)

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#2

Well from the error it looks like in one of the “if” or “else if” statements, the Part.Parent, or the Part.Parent.Parent etc. is returning nil. Where is this part in the explorer? If it was a direct child of the workspace then part.Parent.Parent.Parent wouldn’t work because it would go part->Workspace->game-> nil. Do you want to add some prints write below “if Part then”.

Add the following and tell us what each of them prints please.

   print(part.Parent)
   print(part.Parent.Parent)
   print(part.Parent.Parent.Parent)
   print(part.Parent.Parent.Parent.Parent)
#3

I updated the script to:

script.Parent.Fire.OnServerEvent:Connect(function(player, mousePos)
if script.Parent.Ammo.Value > 0 then
	script.Parent.ReloadServer.Disabled = true
	script.Parent.Ammo.Value = script.Parent.Ammo.Value - 1
	local Head = player.Character.Head.Position
	local FromP = script.Parent.Tip.Position
	local ToP = mousePos
	local RayCast = Ray.new(Head, (ToP - Head).unit*1000)
	local Part, Position = game.Workspace:FindPartOnRay(RayCast, player.Character, false, true)
	if Part then
		if Part.Parent:FindFirstChild("Humanoid") then
			Part.Parent.Humanoid:TakeDamage(26)
		end
		if Part.Parent.Parent:FindFirstChild("Humanoid") then
			Part.Parent.Parent.Humanoid:TakeDamage(26)
		end
		if Part.Parent.Parent.Parent:FindFirstChild("Humanoid") then
			Part.Parent.Parent.Parent.Humanoid:TakeDamage(26)
		end
		if Part.Parent.Parent.Parent.Parent:FindFirstChild("Humanoid") then
			Part.Parent.Parent.Parent.Parent.Humanoid:TakeDamage(26)
		end
	end
	local visualBullet = Instance.new("Part")
	visualBullet.Parent = game.Workspace
	visualBullet.CanCollide = false
	visualBullet.Anchored = true
	local Dist = (ToP - FromP).magnitude
	visualBullet.CFrame = CFrame.new(FromP,Position)*CFrame.new(0,0,-Dist/2)
	visualBullet.Size = Vector3.new(0.3,0.3,Dist)
	visualBullet.Material = Enum.Material.Neon
	visualBullet.Color = Color3.fromRGB(255, 239, 114)
	visualBullet.Name = "GunBullet"
	script.Parent.Tip.Flash.Enabled = true
	script.Parent.Handle.Fired:Play()
	wait(0.04)
	visualBullet:Destroy()
	script.Parent.Tip.Flash.Enabled = false
	script.Parent.ReloadServer.Disabled = false
end
end)

I am still getting the error :confused:

#4

Could you add the prints so we can help debug it. Please add the prints and tell me what they say print out so that I can hep you. Do you know what printing is? Also where is this gun, is it a model in the workspace? Is it a single part in the workspace? Is it in a folder?

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#5

You fire at the base plate. The script checks if humanoid is in the base plates parent, workspace. It’s not. The script checks if humanoid is in workspaces parent, game. It’s not. The script tries to check if humanoid is in games parent. Game has no parent, the script breaks.

You need to check that Part. Parent. Parent (and so on) actually exists

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#6

Thanks, I just updated that. The gun now works perfectly, but it still prints the error…

Edit: I made a spelling mistake in the script right there :uhh:

#7

Instead of having a chain of if statements, you can use Instance:FindFirstChildWhichIsA() to find the Character model.

1 Like