variables across scripts and across gameObjects

Questions & Answers
1

ok i have a problem i want to send some information from one script that is a attached to game object A to game object B’s script. i am trying to get these to objects to look at game object C. its all compiling and stuff but then gives me this error:

NullReferenceException: Object reference not set to an instance of an object
LookAt.Update () (at Assets/Scripts/LookAt.js:13)

i dont understand why, but here are my scripts attach to each objects.

GameObject A’s Script: attackRTriggerStay.JS

 @HideInInspector 
var targetAquired = false;
var attackTarget; 

function OnTriggerEnter (other : Collider) {

	print(targetAquired);
	
	if(other.gameObject.CompareTag ("enemy")){
		
		attackTarget = other.transform;
		targetAquired = true;
		
		print("targetAquired");
	}
		
}

function OnTriggerExit (other : Collider) {

if(other.gameObject.CompareTag ("enemy")){
		targetAquired = false;
		print(targetAquired);
	}

}

Game Object B’s Script: LookAt.JS

    var getChildTrue : attackRTriggerStay;
    var getChildTarget : attackRTriggerStay;
    
    function start(){
    
        getChildTrue = GetComponentInChildren(attackRTriggerStay);
        getChildTarget = GetComponentInChildren(attackRTriggerStay);
    
    }
    
    function Update () {
    	
    	if(getChildTrue.targetAquired == true){
    	
    		transform.LookAt(getChildTarget.attackTarget); //.attackTarget is GameObject C
        }
    
    }
2

Try to rename the function start() into Start() (captial S).
Also a little clean-up:

var otherScript : attackRTriggerStay;

function Start()
{
    otherScript = GetComponentInChildren(attackRTriggerStay);
}

function Update()
{
    if(otherScript.targetAquired)
    {
        transform.LookAt(otherScript.attackTarget); //.attackTarget is GameObject C
    }
}