Resolved Object reference not set to an instance of an object (very strange)

I'm new to the engine but this error looks really strange and I can't understand, where I am wrong
Here's the code

Code (CSharp):

1. using UnityEngine;
2.  
3. public class Enemymovement : MonoBehaviour
4. {
5.     public float speed = 10f;
6.  
7.     private Transform target;
8.     private int wavepointIndex = 0;
9.  
10.     void Start()
11.     {
12.         target = waypoints.points[0];
13.     }
14.  
15.     void Update ()
16.     {
17.         Vector3 dir = target.position - transform.position;
18.         transform.Translate(speed * Time.deltaTime * dir.normalized, Space.World);
19.     }
20. }

Error is in 17 line
NullReferenceException: Object reference not set to an instance of an object
Enemymovement.Update ()

Code of waypoints script in case it is something wrong there

Code (CSharp):

1. using UnityEngine;
2.  
3. public class waypoints : MonoBehaviour
4. {
5.     public static Transform[] points;
6.  
7.     void Awake ()
8.     {
9.         points = new Transform[transform.childCount];
10.         for (int i = 0; i < points.Length; i++)
11.         {
12.             points[i] = transform.GetChild(i);
13.         }
14.     }
15. }
16.  

I suppose that I made stupid mistake but I still can't find it

 

It's confusing that you named your waypoints class in lower case. I was looking for a variable before i continued reading and saw you post the class contents.

Anyways. You set target to points[0]. You get a NullReferenceException. So the content of that is null. We know what is null, now figure out why! This can have various reasons, from code not being executed, to GetChild(0) returning null. Use Debug.Log to print information and gain additional insights.

We also have a forum sticky post about Nullreferenceexceptions in this subforum. Check it out. One of the most common exceptions and solving it is always the same!

 

It does not look even remotely strange. It is a bog-standard nullref. Go fix it.

As Yoreki already hinted at above:

How to fix a NullReferenceException error

https://forum.unity.com/threads/how-to-fix-a-nullreferenceexception-error.1230297/

Three steps to success:
- Identify what is null <-- any other action taken before this step is WASTED TIME
- Identify why it is null
- Fix that

You never need to post for this error.

 

You wouldn't believe me, but after closing and opening the project error dissapeared, but thanks for the hints. I'm just starting learning Unity and your advices are really useful

 

That's unlikely. Not saying i dont believe you, but before you start believing the Engine may be bugged for future errors, these things are way more likely to be human error than any actual bug in the engine. A restart cant hurt, but usually it's safe to assume the mistake is actually on your end. Which may have been the case here too.. maybe you did something before restarting that fixed the error. Anyways, glad you got it resolved. Feel free to ask again if you have trouble in the future. Til then, happy developing!