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Question by MH1 · Apr 20, 2014 at 01:56 PM · c#arraynullreferenceexceptiondebug

NullReferenceException: Object reference not set to an instance of an object player.Update () (at Assets/player.cs:10)

 using UnityEngine;
 using System.Collections;
 
 public class player : MonoBehaviour {
     private int[] coinupto;
     void Start () {
             coinupto = new int[10];
         coinupto[1]=8;
     }
     void Update () {
         Debug.Log(coinupto[1]); //the line throwing the error
 }
 }
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Answer by fendorio · Apr 20, 2014 at 02:37 PM

Where is mainTrigger? It's never assigned to in your code snippet so that would be null.

You also haven't instantiated the array in your code snipped so assigning a value to an index is invalid.

 private int[] coinupto;

 void Start()
 {
    //Instantiate it first.
    coinupto = new int[10]; //Replace 10 with how many values you want to store.

    coinupto[1] = 8;
 }

I don't think that's what you're trying to do though? Your code is confusing. You need to add a GeComponent to your script to fetch the maintriggerscript.

If maintriggerscript is attached to the same gameObject as the one that holds player:

  maintriggerscript SomeScript = GetComponent("maintriggerscript");

Else if it's in another gameObject:

 maintriggerscript SomeScript = GameObject.FindGameObectWithTag("sometag")
                                          .GetComponent("maintriggerscript");
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avatar image MH1 · Apr 20, 2014 at 02:46 PM 0
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Sorry, I didn't realize that I left the reference to maintriggerscript in my code. I took it out and still got the same error. I updated my script.

avatar image fendorio · Apr 20, 2014 at 02:55 PM 1
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In your start function have you added the line:

 coinupto = new int[10];

That is, before/above the line:

 coinupto[1] = 8;

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