Why do I keep on getting this script error?
I'm working on a Gui script which works perfectly when I run it in test mode but then when I run it in a server I get the is error: "Players.Player1.PlayerGui.ScreenGui.MapMenu.Maps.Kamino.Loc:2: attempt to index a nil value" Am I doing the 'FindFirstChild' function correctly? I've had a friend who is more advanced at scripting take a look at it and they said the couldn't spy any errors.
local pic = script.Parent.Parent.Parent:FindFirstChild("Pic")
local info = script.Parent.Parent.Parent:FindFirstChild("Info").info
local n = script.Parent.Parent.Parent:FindFirstChild("Info").Title
local place = script.Parent.Parent.Parent:FindFirstChild("Menu").Enter.LocalScript.PlaceID
local LS = script.Parent.Parent.Parent:FindFirstChild("Menu").Enter.LocalScript
function onClicked(GUI)
LS.Disabled = false
pic.Image = "http://www.roblox.com/asset/?id=209567993"
n.Text = "Tatooine: Mos Eisley"
info.Text = "'Mos Eisley Spaceport. You will never find a more wretched hive of scum and villainy. We must be cautious.' - Ben Kenobi to Luke Skywalker"
place.Value = 191123707
end
script.Parent.MouseButton1Click:connect(onClicked)
1 answer
:FindFirstChild can return nil. That's when the child doesn't exist.
Say there's an object in the workspace called "Apple" and I want to change its color
local apple = workspace.Apple apple.BrickColor = BrickColor.red()
If there isn't an object named "Apple", then when I do workspace.Apple, I will get an error saying there is no such thing.
I could instead use :FindFirstChild:
local apple = workspace:FindFirstChild("Apple")
Now, I won't get any error. But apple is nil, so if I try to do something to it:
apple.BrickColor = BrickColor.red()
I will get an error.
If you're going to use :FindFirstChild, you have to have a plan of what to do when the object doens't exist -- otherwise you should just use . since it's a lot shorter and clearer.
if not apple then -- if apple ~= nil then
apple.BrickColor = BrickColor.new()
else
-- I can't do anything.
end
WaitForChild
In your case, it looks like you're expecting there to be something there. In that case, you should probably use :WaitForChild.
:WaitForChild is similar to :FindFirstChild, except that it is guaranteed to never return nil -- it does this by waiting until there is an object that it can return.
If :WaitForChild isn't a solution, probably you are either looking in the wrong place (wrong script.Parent, etc) or the object is actually named something else (capitalization counts, etc)
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