NullException Error

Script:
var target : Transform;
var moveSpeed = 3;
var rotationSpeed = 3;
var myTransform : Transform;

function Awake()
{
myTransform = transform;
}

function Start()
{
target = GameObject.FindWithTag("Player").transform;
}

function Update(){
transform.LookAt(Vector3(target.position.x, transform.position.y, target.position.z));

myTransform.Translate(Vector3.foward * moveSpeed * Time.deltaTime);
}


This is my error:
NullReferenceException: Object reference not set to an instance of an object
Boo.Lang.Runtime.RuntimeServices.InvokeBinaryOperator (System.String operatorName, System.Object lhs, System.Object rhs)
AIFollow.Update () (at Assets/AIFollow.js:19)


What am I failing to assign?

 

maybe try

transform.LookAt(target);

 

Have you checked if your object has the tag "Player"?
If yes, is it active/enabled?

If no to any of the two questions, GameObject.FindWithTag("Player") will return null. Thus, you get the error when you use target in the Update() function.

 

Please, use code tags:
http://forum.unity3d.com/threads/143875-Using-code-tags-properly

 

I closed Unity and opened back up and the error was gone...Strange. Thank everyone for their suggestions. Now I know what to look for if problem arises in future.