Object reference error in my rocket script

Hi, I am getting an error in my script here:

var linePrefab : GameObject;
var hitPrefab : GameObject; 

var range = 0.00; 
var damage = 0.00;
var layerMask = 1 << 8;
var reloadTime = 0.5;
var ammoCount = 20;

private var lastShot = -10.0;
var hit : RaycastHit;

function Start() {


function Update() {
if(Time.time > reloadTime + lastShot && ammoCount > 0)

function Fire() {

   newLineObject = Instantiate(linePrefab); 
   newLine = newLineObject.GetComponent(LineRenderer);
   if (Physics.Raycast (transform.position, Vector3.forward, Mathf.Infinity, layerMask))
      newLine.SetPosition(0, transform.position); 
      newLine.SetPosition(1, hit.point); 

      if(hitPrefab) Instantiate(hitPrefab, hit.point, Quaternion.LookRotation(hit.normal)); 
      hit.collider.gameObject.GetComponent("PlayersHealth").curHealth -= 10;
      hit.collider.gameObject.SendMessage("ApplyDamage", damage, SendMessageOptions.DontRequireReceiver); 
      Debug.Log("IVE BEEN HIT!!!!");
      newLine.SetPosition(0, transform.position); 
      newLine.SetPosition(1, transform.TransformPoint(Vector3.forward * range)); 

The error occurs at the line: hit.collider.gameObject.GetComponent(“PlayersHealth”).curHealth -= 10;

The error is saying “Object reference not set to an instance of an object.” Can someone take a look at this and give me an idea to what I’m doing wrong? Thank you.

you never do assign hit to anything, so hit.collider.gameObject is null. pass it into your physics statement. For argument structure look here: http://unity3d.com/support/documentation/ScriptReference/Physics.Raycast.html

choose one that takes an out hitinfo: raycasthit as an argument and pass in your hit variable.

Ok, first of all thank you harmless for helping me out. You solved half my problem, but now I have another one. Now the enemies are only able to cast the ray in the direction they are facing when the game starts. Here is my updated physics statement:

if (Physics.Raycast(transform.position, Vector3.forward, hit))

I’m sure this is where the problem is because its the only line I changed.
Could you possibly give me a little more insight? Thank you.