Help with "Invalid argument #1 to 'lower' (string expected got function)"

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#1

Hello developers. So I’ve been trying to make a F1 marshall light system, which starts a function when a specific chat is sent. Everything was working correctly, until I’ve started creating the functions themself.
Basically my code was a print after detected specific message, but now I wanted to replace it with functions. Got the “Invalid argument #1 to ‘lower’ (string expected got function)” error.

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image1145×47 27.1 KB

This is my code:

-- SETTINGS

local GreenFlag = "Green_Flag"; -- Message that sets the flag to Green.
local YellowFlag = "Yellow_Flag"; -- Message that sets the flag to Yellow.
local RedFlag = "Red_Flag";  -- Message that sets the flag to Red.
local VirtualSafetyCar = "VSC";  -- Message that sets the screen to VSC.
local SafetyCar = "SC";  -- Message that sets the screen to SC.

-- LOCALS

local PlayersService = game:GetService("Players");

-- FUNCTIONS
local function GreenFlag()
	script.Parent.Screen.BrickColor = BrickColor.new("Lime green")
end;

local function YellowFlag()
	wait(1.5)
	script.Parent.Screen.BrickColor = BrickColor.new("Bright yellow")
	wait(1.5)
	script.Parent.Screen.BrickColor = BrickColor.new("Really black")
end;

local function RedFlag()
	wait(1)
	script.Parent.Screen.BrickColor = BrickColor.new("Really blue")
	wait(1)
	script.Parent.Screen.BrickColor = BrickColor.new("Really black")
end;
--

PlayersService.PlayerAdded:Connect(function(Player)
	Player.Chatted:Connect(function(Message)
		if string.find(string.lower(Message), string.lower(GreenFlag)) then
			print("GreenFlag")
			GreenFlag()
		elseif string.find(string.lower(Message), string.lower(YellowFlag)) then
			print("YellowFlag")
			YellowFlag()
		elseif string.find(string.lower(Message), string.lower(RedFlag)) then
			print("RedFlag")
			RedFlag()
		elseif string.find(string.lower(Message), string.lower(VirtualSafetyCar)) then
			print("VSC")
		elseif string.find(string.lower(Message), string.lower(SafetyCar)) then
			print("SC")
		end;
	end);
end);

Let me know if anything is unclear.

2 Likes
#2

Thats beacuase the green flag etc are functions. You can either make them return a string or just write “green flag”Etc for each lower thing.

1 Like
#3

I just know that the error says that you did something like that:

string.lower(function)
1 Like
#4

elseif string.find(string.lower(Message), string.lower(YellowFlag)) then

This is not the only line containing an issue, but it should give you the gist of it.
You’re calling string.lower on YellowFlag which was originally a variable but you redefined it to be a function by saying local function YellowFlag().

Change the name of the functions so they won’t be identical to the names of the variables (or vice versa).

1 Like