Object reference not set to an instance of an object (NullRefrenceExepction)

Unity Engine
1

Hello!
I am trying to make a object move, by adding a Rigidbody component to the object:
Rigidbody rb = gameObject.AddComponent();
And then i reference the Rigidbody and add a force:
rb.AddForce(0, 0, 200 * Time.deltaTime);
I get the following error

2

This looks a bit fishy. Where is this executed?

Generally, it’s hard to say what’s going on without seeing the script or at least a part of it. Can you provide it?

3

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

public class Force : MonoBehaviour {

// Use this for initialization
void Start () {

}

// Update is called once per frame
void FixedUpdate () {
Rigidbody rb = gameObject.AddComponent();
rb.AddForce(0, 0, 200 * Time.deltaTime);
}
}

4

ouch, wrong place, put the add component in the Start.

Doing a check to see if it exists would help as well

5

What you are doing here is adding new Rigidbody to a gameobject on every FixedUpdate. That might cause some problems. You only need to add it once. For example, in a Start function:

public class Force : MonoBehaviour
{
    Rigidbody rb;
// Use this for initialization
    void Start () {
        rb = gameObject.AddComponent<Rigidbody> ();
    }

// Update is called once per frame
    void FixedUpdate () {
        rb.AddForce(0, 0, 200 * Time.deltaTime);
    }
}

Please use code tags.

1 Like
6

I would, but i couldnt find them, i realized theyre under “insert”

7

[ code] your code here [ /code]

no spaces before the word code]