:GetAttribute(parameter) attempt to call a nil value

[MEndermanM]

First, I’ve got an error from this script. This script is used to check the Attribute server, and returns it to client.

local RemoteFunction = game:GetService("ReplicatedStorage"):WaitForChild('EventChanged')

function playerAttributeRequired(player, attribute, unit) -- client site input ("FieldOfView", player)
	return unit:GetAttribute(attribute) -- attempt to call a nil value
end

RemoteFunction.OnServerInvoke = playerAttributeRequired

I’m so confused why would that happen. I was guessing maybe "FieldOfView" is not considered to be a string, so I have chenged my code to this:

return unit:GetAttribute(string(attribute))

Then I got another error that called:

attempt to call a table value

I got more confused, why would they get different error when I just turn a String to a String? (maybe)

English is not my main language, sorry for some weird grammar.
I will be appreciated for anyone who answered me. Thank you!

[sssssrg (Ilyason)]

Try using tonumber() instead of string() function. Because FieldOfView Property is numeric data type. Or, if you need string to be returnd, use tostring() instead of string() as @Kacper said.

return unit:GetAttribute(tostring(attribute))

Hope that can help!

[Kacper]

Note that tostring() is not a function, but a call to the tostring function.

[MEndermanM]

Interesting! May you allow me to ask what is the difference between these functions?

Also, it backwards to attempt to call a nil value again. With this code.

local RemoteFunction = game:GetService("ReplicatedStorage"):WaitForChild('EventChanged')

function playerAttributeRequired(player, attribute, unit)
	return unit:GetAttribute(tostring(attribute))
end

RemoteFunction.OnServerInvoke = playerAttributeRequired

I think that means my parameter is string for sure, but I need to solve this problem:
Why would a string parameter don’t work?

[sssssrg (Ilyason)]

So, if you need a string to be returned anyway, use tostring() instead of string().

return unit:GetAttribute(tostring(attribute))

[MEndermanM]

Edited, I do use tostring(attribute), that’s why I said that.

@MEndermanM

I think that means my parameter is string for sure.

[sssssrg (Ilyason)]

The problem is still occuring?

[MEndermanM]

Yes, it backs to the title. Attempt to call a nil value.

[sssssrg (Ilyason)]

Can I see your local script? Because this is a server script I guess.

@MEndermanM

local RemoteFunction = game:GetService("ReplicatedStorage"):WaitForChild('EventChanged')

function playerAttributeRequired(player, attribute, unit) -- client site input ("FieldOfView", player)
	return unit:GetAttribute(attribute) -- attempt to call a nil value
end

RemoteFunction.OnServerInvoke = playerAttributeRequired

[SovereignFrost]

Unit is a nil value. Are you sure when you’re invoking the server you are not passing a player reference?
Your invokeserver should look like this RemoteFunction:InvokeServer(attribute, unit)

[sssssrg (Ilyason)]

Right, that’s why I asked for a local script.

[MEndermanM]

I see what happened. I’m so careless by the way.
It was a RemoteFunction for EventRequired. But I have set my RemoteFunction to EventChanged, which is another RemoteFunction.
I have currented that and solved the question. I’m so sorry about that.

local RemoteFunction = game:GetService("ReplicatedStorage"):WaitForChild('EventChanged')
-- Should be:
local RemoteFunction = game:GetService("ReplicatedStorage"):WaitForChild('EventRequired')

[sssssrg (Ilyason)]

Oh okay, good luck scripting