# UnityEngine.Vector2 does not contian a definition for “Set”… using futile

I am a bit lost, I am using futile and I am just trying to run the demo. But I keep getting UnityEngine.Vector2 does not contian a definition for "Set" in just one class, my using statments are:

using System;
using UnityEngine;
using System.Collections;
using System.Collections.Generic;


When I look at the documents, I see that Set is a function http://docs.unity3d.com/Documentation/ScriptReference/Vector2.html I am using version 3.4.2 (in futile its happening in just the FAtlas class)