Issues with checkpoint and skip stage script

[slqter29 (slat)]

Evertime I test the game it spawns me on checkpoint 2 now and on the leaderboard it displays that I am on stage 0. Also the only checkpoint that spawns me when I die is checkpoint 2. My world spawn isn’t there and I haven’t changed the checkpoint’s name to 0 its still 2.

[Playfullgamer_YT (Playfull)]

@slqter29

I have a checkpoint and a skip stage script in my ServerScriptService and sometimes the skip stage script doesn’t work. Some parts of the script are now highlighted and I have no idea what the issue is.

Here is the skip stage script for ServerScriptService:

MarketplaceService = game:GetService("MarketplaceService")

MarketplaceService.ProcessReceipt = function(receiptInfo)
	player = game.Players:GetPlayers()

	currency = "Stage"

	done = 0

	for i=1,#players do
		if players[i].userId == receiptInfo.PlayerId then
			if receiptInfo.ProductId == 16231369024 and done == 0 then
				done = 1
				players[i].leaderstats[currency].Value = players[i].leaderstats[currency].Value + 1
				players[i].Character.Humanoid.Health = 0
				done = 0
			end
		end
	end
	return Enum.ProductPurchaseDecision.PurchaseGranted	
end

The server side checkpoint script works but it displays 2 error messages, one every time a player touches it and the other one when a player joins the game. The error message that displays when a player touches the checkpoint is:

ServerScriptService.CheckpointScript:23: attempt to perform arithmetic (sub) on string and number

I searched it up and it has something to do with defining Amount.

And here is the error message that pops up in output when a player joins the game.

ServerScriptService.CheckpointScript:37: attempt to index nil with ‘CFrame’

Here is also my server side checkpoint script that I am using:

local Rs = game.ReplicatedStorage
local Event = Rs:WaitForChild("Events")

game.Players.PlayerAdded:Connect(function(Player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Parent = Player
	leaderstats.Name = "leaderstats"
	
	local Stage = Instance.new("NumberValue")
	Stage.Parent = leaderstats
	Stage.Name = "Stage"
	Stage.Value = 0
	
	local CheckpointsFolder = game.Workspace:FindFirstChild("Checkpoints")
	
	for i, Checkpoint in pairs(CheckpointsFolder:GetChildren()) do
		
		Checkpoint.Touched:Connect(function(Hit)
			if Hit.Parent:FindFirstChild("Humanoid") then
				local PlayerHit = game.Players:GetPlayerFromCharacter(Hit.Parent)
				
				
				if PlayerHit.leaderstats:FindFirstChild("Stage").Value == Checkpoint.Name - 1 then
					PlayerHit.leaderstats:FindFirstChild("Stage").Value = Checkpoint.Name
					workspace.SoundFx.Success:Play()
					Event.CheckPointEvent:FireClient(Player)
				end
			end
		end)
		
		Player.CharacterAdded:Connect(function(Character)
			repeat
				wait()
			until Character ~= nil
			
			local HumanoidRootPart = Character:FindFirstChild("HumanoidRootPart")
			HumanoidRootPart.CFrame = CheckpointsFolder:FindFirstChild(Stage.Value).CFrame + Vector3.new(0, 2, 0)
		end)
	end
end)

Error 1: ServerScriptService.CheckpointScript:23 - attempt to perform arithmetic (sub) on string and number This error occurs because you’re trying to perform arithmetic operations on a string and a number in the line if PlayerHit.leaderstats:FindFirstChild("Stage").Value == Checkpoint.Name - 1 then.

To fix this issue, convert the checkpoint name to a number before performing arithmetic operations. You can achieve this by using tonumber(Checkpoint.Name).

Here’s the corrected line:

if PlayerHit.leaderstats:FindFirstChild("Stage").Value == tonumber(Checkpoint.Name) - 1 then

Error 2: ServerScriptService.CheckpointScript:37 - attempt to index nil with ‘CFrame’ This error occurs because you’re trying to access the CFrame property of a checkpoint using CheckpointFolder:FindFirstChild(Stage.Value).CFrame, but the FindFirstChild function might return nil if there is no checkpoint with the specified name.

To address this issue, make sure that the checkpoint exists before attempting to access its properties.

Here’s the corrected line:

local specificCheckpoint = CheckpointsFolder:FindFirstChild(tostring(Stage.Value))
if specificCheckpoint then
    HumanoidRootPart.CFrame = specificCheckpoint.CFrame + Vector3.new(0, 2, 0)
end

By making these adjustments, you should be able to resolve the errors you’re encountering in your checkpoint script. Make sure to test the changes thoroughly to ensure that the script functions as expected.

[slqter29 (slat)]

Thank you so much the checkpoints work finally! Do you have any idea what could be the issue in skip stage script though? It doesn’t work still.

[catalinprooo]

Skip Stage:

local MarketplaceService = game:GetService("MarketplaceService")
local Players = game.Players
local Your_Product_ID = 16231369024

MarketplaceService.ProcessReceipt = function(receiptInfo)
	local currency = "Stage"

	for _, player in ipairs(Players:GetPlayers()) do
		if player.UserId == receiptInfo.PlayerId then
			if receiptInfo.ProductId == Your_Product_ID then
				player.leaderstats[currency].Value += 1
				player.Character.Humanoid.Health = 0
			end
		end
	end

	return Enum.ProductPurchaseDecision.PurchaseGranted
end

[slqter29 (slat)]

For some reason that doesn’t work either.

[remcodesremcodes (Yix)]

why dont you just use a simpler method: PromptProductPurchaseFinished

local mps = game:GetService("MarketplaceService")
local productId = 1623136902

mps.PromptProductPurchaseFinished:Connect(function(playerId, ProductId, purchased)
    if productId ~= ProductId or not purchased then return end
    local player = game.Players:GetPlayerByUserId(playerId)
    if player then
        player.leaderstats.Stage.Value += 1
        player:LoadCharacter()
    end
end)

[slqter29 (slat)]

I finally found the issue and I am so sorry it was literally the dumbest one ever. I accidentally added an extra number to the product id there shouldn’t be a 4 in the end. Thanks for the help!

[slqter29 (slat)]

For some reason it also plays the sound effect if an other player touches the checkpoint. How could I change the sound effect to play only local?

[SnakperFR (AnonymSnakPer)]

I’ve exactly answered that days ago, giving the proper credit is a must, but it’s okay… At least the topic is solved.

[slqter29 (slat)]

Thank you for solving the ServerScriptService.CheckpointScript:23 - attempt to perform arithmetic (sub) on string and number error.

[SnakperFR (AnonymSnakPer)]

There’s no problem, I’m glad your scripts work .
I also solved your CFrame error by converting it into strings, there’s no need to check if the CFrame exists because the event triggering the function was the checkpoint. The condition would be useful if you don’t put your checkpoint inside the CheckPointFolder. Everything was in my last code correction post.
Y’all have a great day,
SnakperFR