NEW SCRIPTER! Does anyone know how I could debug index nil?

A lot of the time, when I test out my code an error pops up, saying "attempt to index nil with '(certain property)'. If you know how to fix this, please respond.

Code:

game.ReplicatedStorage.SkillEvents["Holy Judgement Skill Events"]["Sun Pillar"].OnServerEvent:Connect(function(player, mousePos) local HolyJudge = game.ReplicatedStorage["Holy Judgement Magic Skills"]["Sun Pillar Skill"] local SunPillar = HolyJudge["Sun Pillar"]:Clone() local SunPillarExplode = HolyJudge["Sun Pillar Explosion"]:Clone() local character = player.Character local localplayer = script.Parent local HolyJudgeCircle = game.ReplicatedStorage["Holy Judgement Magic Skills"].HolyJudgeMagicCircle2:Clone() local HolyJudgeAura = game.ReplicatedStorage["Holy Judgement Magic Skills"].HolyJudgeAura:Clone()

--local mouse = game.Players.LocalPlayer:GetMouse()
--//          \\--
 --|Sun Pillar|--
--\\          //--
wait(1)
HolyJudgeCircle.Position = character.LeftFoot.Position
HolyJudgeAura.Position = character.HumanoidRootPart.Position
SunPillar.Position = character.HumanoidRootPart.Position
HolyJudgeCircle.Parent = workspace
HolyJudgeAura.Parent = workspace
SunPillar.Parent = workspace

print("Checkpoint1") local velocity = Instance.new("BodyVelocity", SunPillar) velocity.Velocity = CFrame.new(SunPillar.Position, mousePos).lookVector * 1

print("Checkpoint2")

--//                    \\--
 --|Sun Pillar Explosion|--
--\\                    //--
SunPillar.Touched:Connect(function(hit)
   if hit:IsDescendantOf(character) or hit:FindFirstChild("ParticleEmitter") then return end
    SunPillarExplode.Position = SunPillar.Position
	wait(1)
	HolyJudgeCircle:Destroy()
	HolyJudgeAura:Destroy()
  	SunPillar:Destroy()
   	SunPillarExplode.Parent = workspace

print("Checkpoint3")
if hit.Parent:FindFirstChild("Humanoid") then hit.Parent:FindFirstChild("Humanoid"):TakeDamage(20) wait(0.5) hit.Parent:FindFirstChild("Humanoid"):TakeDamage(20) wait(0.5) hit.Parent:FindFirstChild("Humanoid"):TakeDamage(20) wait(0.5) hit.Parent:FindFirstChild("Humanoid"):TakeDamage(20) wait(0.5) hit.Parent:FindFirstChild("Humanoid"):TakeDamage(20)

	--else 
		
	--hit.Parent:FindFirstChild("Humanoid"):TakeDamage(-100)

end

print("Checkpoint4")
wait(3) SunPillarExplode:Destroy() print("Checkpoint5") end) end)

So, nil is when the script can't find anything. So, say I do game.Workspace.Part3.Name="Part2" If Part3 doesn't exist, it will return something like: Attempt to index nil

Hello.

The error: Attempt to index nil means that you are trying to index (access properties or children) an instance.

Here's an example of a brick that kills you:

Part.Touched:Connect(function(otherPart)
	local humanoid = otherPart.Parent:FindFirstChildOfClass("Humanoid")

	humanoid:TakeDamage(humanoid.Health)
end)

As you might already know, physically simulated things can touch a part, including other parts.

The error Attempt to index nil with TakeDamage would pop up in this situation.

Now to get to debugging.

You'd check what the error says. It says Attempt to index nil with TakeDamage, so we know that the parent of TakeDamage is nil/non-existent.

Now, this is a simple fix. Just add an if statement checking if the humanoid is nil. If it is, it will print "No humanoid found.".

Part.Touched:Connect(function(otherPart)
	local humanoid = otherPart.Parent:FindFirstChildOfClass("Humanoid")

	if humanoid then
		humanoid:TakeDamage(humanoid.Health)
	else
		print("No humanoid found.")
	end
end)

I hope this simple answer helped you. Cheers!

game.ReplicatedStorage.SkillEvents["Holy Judgement Skill Events"]["Sun Pillar"].OnServerEvent:Connect(function(player, mousePos) local HolyJudge = game.ReplicatedStorage["Holy Judgement Magic Skills"]["Sun Pillar Skill"] local SunPillar = HolyJudge["Sun Pillar"]:Clone() local SunPillarExplode = HolyJudge["Sun Pillar Explosion"]:Clone() local character = player.Character local localplayer = script.Parent local HolyJudgeCircle = game.ReplicatedStorage["Holy Judgement Magic Skills"].HolyJudgeMagicCircle2 local HolyJudgeAura = game.ReplicatedStorage["Holy Judgement Magic Skills"].HolyJudgeAura

local mouse = game.Players.LocalPlayer::GetMouse()
--//          \\--
 --|Sun Pillar|--
--\\          //--
wait(1)
HolyJudgeCircle.Position = character.LeftFoot.Position
HolyJudgeAura.Position = character.HumanoidRootPart.Position
SunPillar.Position = character.HumanoidRootPart.Position
SunPillar.Parent = workspace

@cruelu, it wouldn't let me reply the full thing

you might need to wait for the object, by using WaitForChild:(object name)

Can You Send A Code Example, So I Can Look Further Into Your Problem? If You Have One Ofc.