Can someone help me with teleporting NPCs to a map?

I tried using math.random(), but i got a error message, here's the code I used:

local CTorso = Clone:FindFirstChild("UpperTorso") or Clone:FindFirstChild("Torso")
		if Map:FindFirstChild("Min") and Map:FindFirstChild("Max") then
			local Min = Map:FindFirstChild("Min")
			local Max  =Map:FindFirstChild("Max")
			CTorso.CFrame = CFrame.new(math.random(Max.Position.X,Min.Position.X), math.random(Max.Position.Y,Min.Position.Y)+5,math.random(Max.Position.Z,Min.Position.Z))
		else
			error("Min/Max Is Missing From Map")
			break
		end

here's the error message I got Can anyone help me?

Add this to the top of your script.

Max = 150.Studs.Length
Min = 25.Studs.Length

local CTorso = Clone:FindFirstChild("UpperTorso")