Why is adding 2 vector3 throwing an error?

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#1

Hey everyone! So right now I am trying to make a naval artillery barrage, and when I go to add the 2 vector 3’s that need to be added to get a new position, it throws the error unable to perform arithmetic (add) on vector3 and number. I’ve tried coroutines and I don’t know if I’m doing this wrong or what.

local mortar = coroutine.wrap(function(Player, Goal, number)
	if Cooldowns[Player.Name] == nil then
		Cooldowns[Player.Name] = 0
	end

	if tick() - Cooldowns[Player.Name] > 30 then
		if Player.Character:FindFirstChild("Naval Barrage") then
			Cooldowns[Player.Name] = tick()
			local Mortar = workspace["202 - ".. number]

			local tInfo = TweenInfo.new(
				2,
				Enum.EasingStyle.Sine,
				Enum.EasingDirection.InOut,
				0,
				false,
				0
			)

			local newTween = game:GetService("TweenService"):Create(Mortar.PrimaryPart, tInfo, {Orientation = Vector3.new(-75,0,0)})
			newTween:Play()
			newTween.Completed:Wait()

			local Origin = workspace["202 - "..number].FirePart
			Mortar.FirePart.Fire:Play()
			Mortar.FirePart.Smoke:Emit(25)
			Mortar.FirePart.Flash.Enabled = true
			wait(.1)
			Mortar.FirePart.Flash.Enabled = false

			local NGoal = Goal + RandomPointInCircle((Origin.Position-Goal).Magnitude)

			local Final = Projectile(Origin.Position,NGoal,Player)

			local Object = game.ServerStorage.BarrageFX:Clone()
			Object.Parent = workspace.MortarProjectiles

			Object.CFrame = CFrame.new(Final)

			Object.Smoke:Emit(7050)
			Object.Smoke2:Emit(750)
			Object.Debris:Emit(5000)
			Object.Debris2:Emit(5000)

			Object.Explosion:Play()

			game.Debris:AddItem(Object,15)
			Explode(Object,Player)
			wait(1)

			local FinalTween = game:GetService("TweenService"):Create(Mortar.PrimaryPart, tInfo, {Orientation = Vector3.new(0,0,0)})
			FinalTween:Play()
			FinalTween.Completed:Wait()
		end
	end
end)

game.ReplicatedStorage.FireBarrage0.OnServerEvent:Connect(function(Player,Goal, num)
	mortar(Player, Goal, num)
end)
#2 
local NGoal = Goal + RandomPointInCircle((Origin.Position-Goal).Magnitude)

what is this function RandomPointInCircle()
it seem to convert it to magnitude and you are adding that to Goal

#3 
function RandomPointInCircle(Distance)
	--get random requirements, the distance from center and the angle
	local RandomLength = math.random(0,GetInaccuracyRadius(Distance))
	local RandomAngle = math.random(0,360)

	local X = math.cos(math.rad(RandomAngle))*RandomLength
	local Y = math.sin(math.rad(RandomAngle))*RandomLength

	return Vector3.new(X,0,Y)
end
#4

is Goal a vector or magnitude?
is that the line you were getting error from

#5

Goal = Mouse.Hit.p

its from the local script, and yes that is throwing the error

#6

you can’t add magnitude with vector
magnitude is just as the error states is a

number

remove magnitude from

local NGoal = Goal + RandomPointInCircle((Origin.Position-Goal).Magnitude)