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

Questions & Answers
1

so i’m new to Unity and i got this error
NullReferenceException: Object reference not set to an instance of an object
and i can’t figure it out

This is my Enemy Script

public float speed = 10f;

private Transform target;
private int wavepointIndex = 0;

void Start ()
{
    target = Waypoints.points[0];
}

void Update ()
{
    Vector3 dir = target.position - transform.position;
    transform.Translate(dir.normalized * speed * Time.deltaTime, Space.World);

    if (Vector3.Distance(transform.position, target.position) <= 0.10f)
    {
        GetNextWaypoint();
    }
}

void GetNextWaypoint()
{
    if (wavepointIndex >= Waypoints.points.Length - 1)
    {
        Destroy(gameObject);
        return;
    }

    wavepointIndex++;
    target = Waypoints.points[wavepointIndex];
}

This is my Waypoints script:

public static Transform[] points;
private int i;

void Awake ()
{
    points = new Transform[transform.childCount];
    for (int i = 0; i < points.Length; i++);
    {
        points *= transform.GetChild(i);*

}
}
}

2

I’d guess that the gameobject with the Waypoint component does not have any children. you could write this into your Start method to confirm that:

Debug.Log(Waypoints.points.Length);

But what you should definitely do is relay the GetNextWaypoint() method into Waypoints and just return one. if the result is null, destroy, if not, use it as is.
This way the enemy script doesn’t need to know how many waypoints there are.

And of course: What is a Null Reference Exception?