var pickUpDistance : float;
var cameraVar : Transform;

private var hit : RaycastHit;

    function Update(){
        //debug ray
        Debug.DrawRay(Camera.main.transform.position, Camera.main.transform.TransformDirection(Vector3.forward) * 100, Color.red);

        if(Input.GetButtonDown("Action")){
           PickUpWeapon();
        }
    }

    function PickUpWeapon(){
        //is the object within range?
        var rayVar = Physics.Raycast(cameraVar.transform.position, cameraVar.transform.forward, hit, pickUpDistance);
        if(rayVar){
           //is the object tagged "weapon"?
           if(hit.collider.GameObject.tag == "weapon"){
             print(hit.collider.Gameobject.name);
           }
           else{
             print("not a weapon");
           }
        }
        else{
           print("miss");
        }
    }

I get a NullReferenceException when I press my "action" button and the object is within range. This is the script I based it off of, but instead I'm finding the tag not the name:

function Update () {

   var up = transform.TransformDirection(Vector3.up);
   var hit : RaycastHit;    
   Debug.DrawRay(transform.position, -up * 10, Color.green);

   if(Physics.Raycast(transform.position, -up, hit, 10)){
      Debug.Log("Hit");    
      if(hit.collider.gameObject.name == "floor"){
           Destroy(GetComponent(Rigidbody));
      }
   }
}

I have no idea what I did wrong can someone help?!

Thanks!