NullReferenceException in Raycast script

So, I've come up with a script that tells me what I'm looking at and then makes me move toward it when I hold the "Fire1" button. However when I press this button it gives me a NullReferenceException. I can't seem to locate the problem.

The script still works but I would like "not" to get the error report.

I have tried to locate the problem but my brain is failing me it seems. And help would be appreciated!

    private var distance : float = 20.0;
 
 
 
 var speed : float;
 
 var moveToMe : Transform;
 
 
 
 
 
 function Update () {
 
 
 
     var cam : Transform = Camera.main.transform;
 
     var ray = new Ray(cam.position, cam.forward);
 
     var hit : RaycastHit;
 
     
 
     if(Physics.Raycast(ray, hit, distance)){
 
     
 
     var moveToMe = hit.transform;
 
     Debug.Log(hit.transform.name);
 
     }
 
     
 
     if (Input.GetButton("Fire1") && hit.collider.tag == "Lerpz"){
 
          
 
     transform.position = Vector3.Lerp(transform.position, moveToMe.position, Time.deltaTime * speed);
 
     }
 
     
 
     Debug.DrawLine(ray.origin, ray.origin + ray.direction * distance);
 
     
 
 }