Attempt to index "nil" with target upon attempting to use mouse.target

Help and Feedback Scripting Support
1

So I am trying to make a small script that checks if whatever the player’s pointing at is a par or a meshpart, however the problem occurs when I attempt to use Mouse.Target, as the error is always "Attempt to index “nil” on line 6 of the following code:

local debounce = true
local Player = script.Parent.Parent.Parent
local Mouse = Player:GetMouse()
script.Parent.Activated:Connect(function()
	if debounce == true then
		if Mouse.Target:IsA("MeshPart") or Mouse.Target:IsA("Part") then
				print("Valid target")
		end
	end
end)

The script is parented to a tool which is parented into starterpack. I tried printing the “Player” variable and confirmed that it was indeed the player.
I have no clue what to do or why Mouse.Target is nil, and that’s why I come forth seeking help.

2

This usually happens if you look at the sky, you’re not hovering over a target so it’ll nil, add another check and should be good

local target = Mouse.Target
if target and target:IsA("BasePart") then

Also recommend check if they’re a BasePart, which accounts for Wedges, meshparts, Parts, anything that is a building block basically

Make sure it’s a localscript if it isn’t already

2 Likes
3 
local debounce = true
local Player = script.Parent.Parent.Parent
local Mouse = Player:GetMouse()
script.Parent.Activated:Connect(function()
	if debounce == true then
		if Mouse.Target:IsA("MeshPart") or Mouse.Target:IsA("BasePart") then
				print("Valid target")
		end
	end
end)
1 Like
4

you’re targeting the sky, it will return nothing

1 Like
5

If you need a check to happen constantly, consider writing something like this:

local Equipped = false
local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()

script.Parent.Equipped:Connect(function()
    Equipped = true
end)

script.Parent.Unequipped:Connect(function()
    Equipped = false
end)

game:GetService("RunService").RenderStepped:Connect(function()
   if Equipped == true then
       if Mouse.Target:IsA("MeshPart") or Mouse.Target:IsA("BasePart") then
           print("Valid target")
       end
   end
end)
1 Like
6

Is that a server script or a localscript?
You can’t get the player’s mouse from a server script, GetMouse() will just return nil. Maybe that’s your issue?

An example solution would be to make a localscript fire a remote upon Activated, which would send the player’s Mouse.Target to the server, and then the server script would be able to use it.

1 Like
7

I believe it is a local script, as server script would not even allow you to index :GetMouse().

9

Have never been trying to use :GetMouse() from server, though, as the creator of the post said, his error states:

"Attempt to index “nil” on line 6

10

OP’s problem could’ve meant 2 things, Attempt to index nil with IsA or Attempt to index nil with Target, judging by how Kiriot’s post got the solution, it’s likely it was the latter

@Mihnealihnea I still recommend what I had done in my code by checking the Target exists because even though Kiriot fixed your error, it can still error again if you look at the sky

1 Like
11

Well, I really should have paid more attention/or specified that. In other words, this is the solution: I made it a server-side script accidentally, and that’s why it kept returning nil no matter what. Thank you!
Also since there seems to be some discussion about the error, here’s a snippet showing it in full detail:
image