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This question was closed Apr 17, 2017 at 10:25 AM by hexagonius for the following reason:

https://docs.unity3d.com/Manual/NullReferenceException.html

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Question by magnar81 · Apr 17, 2017 at 08:55 AM · unity 5

NullReferenceException: Object reference not set to an instance of an object

Why am i getting an "Object reference not set to an instance of an object" error ?

ScriptA

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class touchManager : MonoBehaviour {

     public GameObject targetMarker;

     void Start () {    

     }    
 }

And scriptB

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class tileManager : MonoBehaviour {
 
     touchManager tManager;
     GameObject tMarker;
 
     void Start() { 
         tMarker = tManager.targetMarker;
     }
 
 }
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avatar image SohailBukhari · Apr 17, 2017 at 09:16 AM 0
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$$anonymous$$ake sure you assign the references in the hierarchy and check for duplicate script in the scene.

avatar image magnar81 SohailBukhari · Apr 17, 2017 at 09:31 AM 0
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I have assigned the reference in the inspector and this are the only code and scripts.

avatar image SohailBukhari magnar81 · Apr 17, 2017 at 11:05 AM 0
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did you make sure there is no duplicate script in the scene? If you assigned references then editor never throw exceptions.

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Answer by UnityCoach · Apr 17, 2017 at 10:10 AM

You obviously didn't assign the tManager reference, as it is private and not marked as Serialised. You can either mark it as public :

 public touchManager tManager;

or serialised

 [SerializeField] touchManager tManager;

Then, assign it the touchManager you have assigned a gameObject to.

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