Attempt to indext nil with 'Position'

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#1

I’m trying to make an NPC chat system but this error keeps happening: “Attempt to index nil with ‘Position’”

My code:

runService.RenderStepped:Connect(function()
	
	if detected == false and chatting == false then
		for i, NPC in pairs(npcs:GetChildren()) do
			local Humanoid = NPC:FindFirstChild("Humanoid")
			local HMR = NPC:FindFirstChild("HumanoidRootPart")

			if Humanoid and HMR then
				if (HMR.Position - plrHMR.Position).magnitude < 15 then  --where the error is happening
					detected = true
					detectedNpc = NPC
					eButton.Visible = true
					print(NPC.Name)
				end
			end
		end
	end

I have no idea why it’s happening and it’s driving me crazy.

#2

Where are you defining “plrHMR”?

#3

It is at the top of the script, not in any functions.

#4

Could you send the line(s) of code where you define it?

#5 
--//Player

local player = game.Players.LocalPlayer
local camera = game.Workspace.CurrentCamera

-- Character

local char = player.Character
local plrHMR = char:FindFirstChild("HumanoidRootPart")
#6 
local char = player.Character or player.CharacterAdded:Wait()

Or potentially:

local plrHMR = char:WaitForChild("HumanoidRootPart")