Error Message Doesn't Make Sense

I am making a traffic light that changes upon a variable, and I keep getting the error message: Label is not a valid member of Model “Workspace.Crossing1.ControlBox”. This is my code,

local TrafficLight = script.Parent
local RedLight = game.Workspace.TrafficLight.RedLight
local YellowLight = game.Workspace.TrafficLight.YellowLight
local GreenLight = game.Workspace.TrafficLight.GreenLight
local RedPointLight = game.Workspace.TrafficLight.GreenLight.PointLight
local YellowPointLight = game.Workspace.TrafficLight.YellowLight.PointLight
local GreenPointLight = game.Workspace.TrafficLight.GreenLight.PointLight

while true do
	if script.Parent.Parent.Crossing1.ControlBox.IsOn.Value == true then
		wait(5)
		RedLight.Transparency = 0.8
		GreenLight.Transparency = 0
		YellowLight.Transparency = 0.8
	elseif script.Parent.Parent.Crossing1.ControlBox.IsOn.Value == false then
		RedLight.Transparency = 0
		GreenLight.Transparency = 0.8
		YellowLight.Transparency = 0.8
	end
end

Why are you specifying game.Workspace? The code should read as follows:

local TrafficLight = script.Parent
local RedLight = TrafficLight.RedLight
local YellowLight = TrafficLight.YellowLight
local GreenLight = TrafficLight.GreenLight
local RedPointLight = RedLight.PointLight
local YellowPointLight = YellowLight.PointLight
local GreenPointLight = GreenLight.PointLight

while true do
	if script.Parent.Parent.Crossing1.ControlBox.IsOn.Value == true then
		wait(5)
		RedLight.Transparency = 0.8
		GreenLight.Transparency = 0
		YellowLight.Transparency = 0.8
	elseif script.Parent.Parent.Crossing1.ControlBox.IsOn.Value == false then
		RedLight.Transparency = 0
		GreenLight.Transparency = 0.8
		YellowLight.Transparency = 0.8
	end
end

We do it this way so if the model/part/whatever gets moved, we don’t have to change the references. Also, you have an issue where RedPointLight was referencing GreenLight. I fixed that above.

One other thing. You will need to enable/disable the point light for the individual lights. To be more realistic, you may want to use a surface light instead, but that’s just a suggestion.

As for your original issue, is there a BoolValue named IsOn that is parented to ControlBox? Based on the error message that you are getting, that sounds like the problem.

IsOn is a variable inside the control box.

In that case, what is the class of ControlBox? Can you provide a screenshot of your explorer window, and your properties window with ControlBox selected?

Here is my explorer
Screenshot

Ok, so IsOn does appear to be a Boolean value. What line does it say the error is happening on?

I think the IsOn value isnt a bool value. try checking it and see if it works

It has a checkbox as the value so it is a boolean

How can I check what line its on?

are you sure the error is coming from this script? it says ‘label’ is not a valid child and there is no word ‘label’ in your given code.

Oh I see the problem. It was another script. Thanks!