How would a get position of mouse when using in serverscriptservice?

I am using a Remote Event and calling from local script.

LOCAL SCRIPT local repstore = game:WaitForChild("ReplicatedStorage") local Remote = repstore:WaitForChild("SmokeFlyStart")

Player = game.Players.LocalPlayer Mouse = Player:GetMouse()

cool = true

Mouse.KeyDown:Connect(function(key)

key = key:lower() if key == "r" then if cool ~= true then return end cool = false

 Remote:FireServer(Mouse.Hit.p)

wait(5)
cool = true

end

end)

PROBLEM IN SCRIPT

for i = 1,200 do 
		wait()
		char.HumanoidRootPart.CFrame = CFrame.new(char.HumanoidRootPart.Position,HOW WOULD I GET MOUSE.HIT.P in this script)
		BV.Velocity = char.HumanoidRootPart.CFrame.lookVector*60
	end

You fired the server with the right value you just never actually make a function serverside to "intercept" it.

Before I start you should not be using mouse.KeyDown as it is deprecated, heres a useful guide on how to use the 2 new methods.

Local

local repstore = game:WaitForChild("ReplicatedStorage") 
local Remote = repstore:WaitForChild("SmokeFlyStart")
Player = game.Players.LocalPlayer Mouse = Player:GetMouse()
cool = true
Mouse.KeyDown:Connect(function(key)
	key = key:lower()
	if key == "r" then if cool ~= true then return end cool = false
		Remote:FireServer(Mouse.Hit.p)
	wait(5)
	cool = true
	end
end)

We are going to use a thing called "OnServerEvent"

Server

game:WaitForChild("ReplicatedStorage"):WaitForChild("SmokeFlyStart").OnServerEvent:Conncet(function(mouseval)
for i = 1,200 do
        wait()
        char.HumanoidRootPart.CFrame = CFrame.new(mouseval.X,mouseval.Y,mouseval.Z)
        BV.Velocity = char.HumanoidRootPart.CFrame.lookVector*60
    end
end)

local repstore = game:WaitForChild("ReplicatedStorage") local Remote = repstore:WaitForChild("SmokeFlyStart")

Remote.OnServerEvent:Connect(function(player)

local char = player.Character

	for i, v in pairs (char:GetChildren()) do
		if 	v.ClassName == "Part" or v.ClassName == "MeshPart" then
			v.Transparency = 1
			end		
	end
	local Smoke = game.Lighting.Smoke:Clone()
	Smoke.Parent = char.HumanoidRootPart
	local BV = Instance.new("BodyVelocity",char.HumanoidRootPart)
	BV.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
	for i = 1,200 do 
		wait()
		char.HumanoidRootPart.CFrame = CFrame.new(mouseval.X,mouseval.Y,mouseval.Z)
		BV.Velocity = char.HumanoidRootPart.CFrame.lookVector*60
	end
	for i, v in pairs (char:GetChildren()) do
			if v.ClassName == "Part" or v.ClassName == "MeshPart" then
				if v.Name ~= "HumanoidRootPart" then 
				 v.Transparency = 0 
			end
		end
	Smoke:Destroy()	
	BV:Destroy()
	end

end)

using mouseval I got this error ServerScriptService.SmokeFly:23: attempt to index global 'mouseval'(a nil value)