This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 3 months ago.
I am getting this error:
NullReferenceException: Object reference not set to an instance of an object Obstacle.OnTriggerEnter2D (UnityEngine.Collider2D collision) (at Assets/Scripts/Obstacle.cs:22)
There is no problem in the code. Where am I making a mistake?
[[enter image description here](https://i.stack.imgur.com/sSDkt.png)](https://i.stack.imgur.com/PRHdO.png)
Please help.
This is an issue caused by a small typo in the form of a lowercase ‘s’ instead of an uppercase ‘S’.
Because the Unity Engine was looking for Start and couldn’t find it, your “start” code never ran. Because of that, your Player was never assigned to, and had a “null reference”. And that’s why when you tried to read the tag, for a reference that was null, you got the error.
Your code should be:
private void Start ()
{
..
}
Note the exact case for Start and all C# commands.
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This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 3 months ago.
This post was edited and submitted for review 3 months ago and failed to reopen the post:
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I'm trying to do a little bit of cleaning up and I seem to be getting the follow
NullReferenceException: Object reference not set to an instance of an
object DestroyCollision.OnCollisionEnter2D (UnityEngine.Collision2D
collision) (at Assets/Scripts/DestroyCollision.cs:66)
Now though, even though the entire script works perfectly (there's literally no bugs or anything) and the object reference is set correctly (since the object in question gets its active state set to false), I am stumped as to why there are any issues. The following code is the line in question:
if (collision.gameObject.tag == "Shield")
{
GameObject.FindGameObjectWithTag("Shield").SetActive(false);
Destroy(this.gameObject);
}
The shield object is properly tagged, and as I said, setactive(false) gets applied. Line 66 is the gameobject.find... of that line of code there.
Why am I getting the error and how to fix it?
Are you sure you mean to have Destroy(this.gameObject); instead of Destroy(collision.gameObject);?
We know collision.gameObject is not null there, but you provide no info on what this.gameObject is.
This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 11 months ago.
This is an old project of mine. i haven't opened it for some time. As far as i remember it was working perfectly fine. but today when i opend it it stopped working. i haven't change a single line of code. it just stopped working(it builds just fine but dont start after). After a full night of frustration i found the reason of why its not starting but couldn't imagine or find any possible solution, cause it was eorking perfectly fine but suddenly it decided to stop working.
Please help :)
i swear i haven't changed a single line of code. not even a coma.
It's because you have called PopulateGridViewEmployee with an empty searchKey which is an Optional Argument set to Null.
Hence you're getting System.ArgumentNullException
To fix it change the optional argument to have an empty string:
PopulateGridViewEmployee(string searchKey = "")
This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 2 years ago.
This code is basically using the code from https://gist.github.com/runewake2/b4b7bf73485222f7c5a0fe0c91dd1322strong text
I have already assigned the variable but still got this error. Can anybody tell me how? I watched this guy tutorial and he did it with this code so there shouldn't be a problem I guess.
The problem is that you don't initialize the property private Material material; When you create object like that you create a reference that points to null. In your code you are trying to modify this object but since it's not initialized it's null. The solution is to initialize it in the constructor like so:
public FlowLines()
{
this.material = new Material();
}
This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 7 years ago.
i new to Unity3D, so i take look to tutorials, and bump into issue with error linked in tittle of this thread. So. i Wrote exactly code that this guy wrote, and do also exactly what he do, but get error. I add rigidbody to mine player object. Here picture:
Tutorial: http://unity3d.com/learn/tutorials/projects/roll-a-ball/set-up?playlist=17141
Are you sure the setup() function is ever called, which initializes the rb variable? It seems like this is variable, which is null. Try to replace rb.AddForce(mouvment * speed) with GetComponent<Rigidbody>().AddForce(mouvement * speed);. Alternatively, rename your setup() function to Awake() or Start().
This question already has answers here:
What is a NullReferenceException, and how do I fix it?
(27 answers)
Closed 7 years ago.
I have been searching for an answer for 3 days now but cannot seem to find one. Im not an expert coder but have some sort of knowledge in the field.
I am trying to incorporate RevMob AD Network into my application but I keep getting this error when I call the revmob.ShowFullscreen(); in Start().
NullReferenceException: Object reference not set to an instance of an object RevMobSampleAppCSharp.Start () (at Assets/Scripts RevMobSampleAppCSharp.cs:36)
Just create an instance of revmob by the sounds of it...
revmob myRevmob = new revmob();