Checking objectvalue's value existance. Gives an error or false positive when nil

[atomlol6666 (Joe)]

1. What do you want to achieve? Keep it simple and clear!

Checking if the objectvalue’s value exists
2. What is the issue? Include screenshots / videos if possible!

3. What solutions have you tried so far? Did you look for solutions on the Developer Hub?
   Here are the forums i already checked
   How to check if the ObjectValue's Value exists
   And here are the various method I’ve already tried
   if NextNode.Value then
if NextNode.Value ~= nil
if NextNode.Value:IsDescendantOf("workspace")

Here are the codes

-----Route & TargetSpeed-----
while wait(0.01) do
	--TargetSpeed--
	if BrakeApplied == false then
		TargetSpeed.Value = math.clamp(TargetSpeed.Value,0,MaxSpeed.Value)
		if Increment ~= "." then
			if Increment == "+" then
				if TargetSpeed.Value ~= MaxSpeed then
					TargetSpeed.Value += 1
				end	
			elseif Increment == "-" then
				if TargetSpeed.Value ~= 0 then
					TargetSpeed.Value -= 1
				end	
			end
		end
		TargetSpeed.Value = math.clamp(TargetSpeed.Value,0,MaxSpeed.Value)
	end	
	--Route--
	if NextNode.Value:IsDescendantOf(game.Workspace.Railway.Nodes) then
		TTNDistance = (Primary.WorldPosition.X - NextNode.Value.WorldPosition.X+
			Primary.WorldPosition.Y - NextNode.Value.WorldPosition.Y+
			Primary.WorldPosition.Z - NextNode.Value.WorldPosition.Z
		)
	else	
		TTNDistance = (
			Primary.WorldPosition.X - NextSignal.Value.SignalTransmitter[NextSignal.Value.Name].WorldPosition.X+
			Primary.WorldPosition.Y - NextSignal.Value.SignalTransmitter[NextSignal.Value.Name].WorldPosition.Y+
			Primary.WorldPosition.Z - NextSignal.Value.SignalTransmitter[NextSignal.Value.Name].WorldPosition.Z
		)	
	end
	local SignalPasser = DriverCar.Seat.SignalPassed
	if TTNDistance < 1   then
		warn("Lower")
		if not NextNode.Value:IsDescendantOf(game.Workspace.Railway.Nodes) then --Is a signal
			local FNextSignal = NextSignal.Value			
			local Red = FNextSignal.Red.Value
			local White = FNextSignal.White.Value
			local Following = FNextSignal.Following.Value
			--NextSignal.Value = Following

			local node = NextSignal.Value.SignalTransmitter[NextSignal.Value.Name].NextSubNode.Value
			if node == nil then
				NextNode.Value = nil
			else
				NextNode.Value = node
			end

			SignalPasser:Invoke(FNextSignal,Red,White)
		else--Is a node
			local FNextNode = NextNode.Value
			if NextNode.Value.NextSubNode:IsDescendantOf(game.Workspace.Railway.Nodes) and NextNode.Value.NextSubNode.Value.Name == "Node" then--Continues
				NextNode.Value = NextNode.Value.NextSubNode.Value
			else
				NextNode.Value = nil
			end
		end
	end	
end

[Boustifail]

Hello there.

Can you provide us a screenshot of the red line error on the output?

[Prerak12345678]

Hello. Try using FindFirstChild() and see what happens. That may solve your problem. You can also try using FindFirstChildOfClass() to check.

[Prerak12345678]

local part = workspace:FindFirstChild("Part")
if part then
	part.Transparency = 0.5
end

[atomlol6666 (Joe)]

I must’ve made a mistake with the ~= nil one or some issues with the code

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