Unable to cast value to Object?

in a Script in ServerScriptStorage

It's supposed to fire to a client giving the name of the model so that the other script can clone the model from the name and place it.

local remotevents = game.ReplicatedStorage.RemoteEvents
local partplacer = remotevents.PartPlacer

partplacer.ShowPart.OnServerEvent:connect(function(plr,modelName)
	partplacer.ShowPart:FireClient(modelName)
end);

This is the client |v|

local model = game.ReplicatedStorage.Model
local plr = game.Players.LocalPlayer
local mouse = plr:GetMouse()

local PartPlacerModel = game.ReplicatedStorage.RemoteEvents.PartPlacer


local function updatePart(model)
	model:SetPrimaryPartCFrame(CFrame.new(math.floor(mouse.Hit.p.X),0.5,math.floor(mouse.Hit.p.Z)))
end;


mouse.KeyDown:connect(function(key)
	if key == "e" then
		PartPlacerModel.ShowPart:FireServer(model.Name)	 -- Firing the ModelName 
	end;
end);

PartPlacerModel.ShowPart.OnClientEvent:connect(function(plr, modelName)
	local model = game.ReplicatedStorage:FindFirstChild(tostring(modelName))
	if model then
		local newModel = model:Clone()
		newModel.Parent = game.Workspace
		mouse.Move:connect(function()
			updatePart(newModel)	
		end);
	end;
end);

Hey TheShiningSavior,

Two problems immediately apparent with this script are that you do not provide a player to FireClient on line 5 of the server script, and that you have an argument plr on line 19 of the client script. The problems with these things, respectively, are that:

1. When you call FireClient, you have to specify who you want to affect, like so: FireClient(plr, ...)

2. OnClientEvent does not supply a player, because you should already know who the player is: you could retrieve that with game.Players.LocalPlayer in any LocalScript. Because a player is not provided, the model name is actually supplied to plr, and modelName would be nil.

It's also worth noting that you're moving the model on line 9 of the client script. You should never move parts or models with a local script, because this will immediately stop being replicated to other clients if filtering is enabled. You should instead do this in the server script.

I hope this helps. Have a nice day, TheShiningSavior, and best of luck with your game!

Best regards,

tkcmdr

Sources:

RemoteEvent Wiki Page

Filtering Explanation Page