Attempt to Index nil with Backpack

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1
  1. What do you want to achieve?
    I want to give a sword to the player upon touching a part, but check to see if they have a sword first. If they do, then don’t give them the sword.
  2. What is the issue?
    " Workspace.Part.Script:9: attempt to index nil with ‘Backpack’ "
    Here is the script:
script.Parent.Touched:Connect(function(hit)
	local player = game:GetService("Players"):GetPlayerFromCharacter(hit.Parent)
	if player then
		if player.Backpack:FindFirstChild("ClassicSword") == nil then --this is line 4
		end
	else
		local sword = game.ReplicatedStorage.ClassicSword
		local swordClone = sword:Clone()
		swordClone.Parent = player.Backpack --this is line nine
	end
end)

I’m not sure what is wrong with line nine. I suspect that something goes wrong in the beginning of the “if” statement but I’m not sure.
3. What solutions have you tried so far?
Well the original script didn’t have “== nil” on line 4, so I thought that was the issue at first. But I added that and it still isn’t working. I looked at similar posts to mine on the dev forum but all of them had different issues than mine, whether it be the wrong script type, not defining player, etc. I didn’t see my specific issue in them. I might be overlooking something really obvious though.

2

If player is nil, then it will go to this line. Since player is nil, it can’t find backpack and errors.

3

I checked and you’re right, player is nil. I don’t know why though, the variable works fine in the beginning of the script

4

after the else it means it will run if the player is nil, you need to put it before the else.

5

Sorry, I’m not sure what you mean. Put what before the else?

6

couldn’t you just use local player = game:GetService('Players').LocalPlayer instead when the part is touched?

7

I don’t think I can use LocalPlayer in a server script, unless it’s different when you’re using it with the players service

8 
script.Parent.Touched:Connect(function(hit)
	local player = game:GetService("Players"):GetPlayerFromCharacter(hit.Parent)
	if player then
        if not player.Backpack:FindFirstChild("ClassicSword") and not hit.Parent:FindFirstChild("ClassicSword") then
		   local sword = game.ReplicatedStorage.ClassicSword
		   local swordClone = sword:Clone()
		   swordClone.Parent = player.Backpack --this is line nine
        end
	end
end)
3 Likes
9

Thank you, very much appreciated! Does this work because it’s also checking the character?

1 Like