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

Questions & Answers
1

Using the following script I get the following error ; “NullReferenceException: Object reference not set to an instance of an object” for both lines 32 and 18 .

using UnityEngine;
using System.Collections;

public class HealthPoints : MonoBehaviour {

	public int health = 1;
	public GameObject Enemy;
	ScoreManager scoreManager;

	// Update is called once per frame

	void Start(){
		scoreManager = GetComponent<ScoreManager>();
	}

	void Update () {
		Die ();
	}
	
	void OnTriggerEnter2D(){

		Debug.Log ("You hit something!");
		health--;

	}

	void Die(){
		if (health <= 0) {
			Destroy (gameObject);
			if (gameObject.layer == 8) {
				scoreManager.score=10;
				Debug.Log ("Enemy has died!");
			}
		}
	}
}

Here is the “ScoreManager” Script :

using UnityEngine;
using System.Collections;

public class ScoreManager : MonoBehaviour {
	
	public GUISkin theSkin;
	public int score;

	// Use this for initialization
	void Start () {
		score = 0;
	}

	void OnGUI(){
		GUI.skin = theSkin;
		GUI.Label (new Rect (Screen.width/2, 0, 100, 100), "" + score);
	}
}

I’m not sure what to do as the error only appears after a trigger occurs. I believe it has something to do with the variable (int) score from the ScoreManager script, but I am unsure on how to resolve it. I have also looked at various other Unity Answers pages but despite my code being fairly similar, it still doesn’t work. Thank you for reading and I appreciate any answers.

2

scoreManager = FindObjectOfType();