Object reference not set to an instance of an object

Questions & Answers
1

Hi there! I’m trying to make a simple script, that will add a gameobject to my list, when the player collides with it and presses the use key. However I keep getting the “Object reference not set to an instance of an object” error. It points to the second script, line 22. Any help?

First script PlayerInventory.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class PlayerInventory : MonoBehaviour {
	
	public List<GameObject> myInventory;
	
	void Start()
	{	    		
		myInventory = new List<GameObject>();
	}
		
	public void AddToInventory(GameObject newItem)
	{
		myInventory.Add (newItem);
		Debug.Log ("Added");
	}
	
}

Second script GameObjectToInventory.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class GameObjectToInventory : MonoBehaviour {	
		
	private PlayerInventory playerInventory;	

	void OnTriggerStay(Collider otherObject) 
	{	
		
		if(Input.GetButtonDown("Use")){			
				PlayerInventory playerInventory = GetComponent<PlayerInventory>();			
				playerInventory.AddToInventory(this.gameObject);
				Destroy (this.gameObject);
				}
	}	
}
2

There’s no line 22 anywhere, but I can tell you that your second script has a syntax error. You have tried to instantiate playerInventory twice. Only one line needs changing:

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
 
public class GameObjectToInventory : MonoBehaviour {    
 
    private PlayerInventory playerInventory;   
 
 
    void OnTriggerStay(Collider otherObject) 
    {  
 
       if(Input.GetButtonDown("Use")){      
          playerInventory = GetComponent<PlayerInventory>();
          playerInventory.AddToInventory(this.gameObject);
          Destroy (this.gameObject);
      }
    }  
}