Instantiate function returning NullReferenceException

Question

I know there are many similar questions here, but none of the answers I found apply to my problem, it seems like it's all perfect, but still i get the error.

 public var target_prefab : GameObject;
 
     function Update (){
         if(hit){
             Instantiate (target_prefab,  Vector3(Random.Range(-200,200),Random.Range(46,250),Random.Range(-600,100)), Quaternion.Identity);
             points++;
             hit = false;
         }
     }

The target_prefab is properly set on the inspector. The hit boolean is set true by another script. I've debugged it, and it is fine. I tried putting the bugged line (the instantiate function) in another function out of update, tryed to atribute it to a GameObject variable (var example : GameObject; example = Instantiate...), tryed putting that line on another script, changing the random values with simple ints, but i can't seem to figure out the problem.

I'm sorry if this is a redundant, or stupid question and i didn't realize. Thanks in advance for any help.

Answer 1

Answer by Lazdude17 · Jul 02, 2014 at 05:57 AM

What scripts do you have on the prefab you are instantiating? Did you apply any changes on your prefab object in your scene that perhaps have not been made to the base prefab? Could you post the error itself with the code in question?

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thiagoeo · Jul 02, 2014 at 11:01 PM 0

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The error is:

NullReferenceException: Object reference not set to an instance of an object GameController.Update () (at Assets/GameController.js:48)

the line is the one with the Instantiate, and i believe the only code that has to do with it is the one I posted in the question, but if you think it's nescessary to find the problem, I can post the whole code.

I have a script on the prefab with the following code: private var player : GameObject;

 function Awake(){
     player = GameObject.FindWithTag("Player");
     GetComponent("SmoothLookAt").target = player.transform;
 }
 
 function OnTriggerEnter(other : Collider){
     player.GetComponent("GameController").hit = true;
     Destroy(gameObject);
 }

The only changes I did to the prefab on scene where in this script, but I already tryed updating the base prefab and it didn't work. Thank you for the answer

Lazdude17 · Jul 04, 2014 at 06:17 PM 0

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Quaternion.Identity should be Quaternion.identity

Instantiate function returning NullReferenceException

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