Null Reference Exception when trying to refer to a public variable in unity

A NullReferenceException in Unity indicates that you are trying to access a member of an object reference that is null, or null reference. This means that the object you are trying to access has not been instantiated, or has been set to null somewhere in your code.

Here are a few things you can try to troubleshoot this issue:

1. Make sure that the object you are trying to access has been instantiated. If you are trying to access a GameObject in your scene, make sure that it has been added to the scene and that its gameObject field is not null.

2. Check for typos in your code. Make sure that you are spelling the name of the object and its member variables correctly.

3. Make sure that the object has not been destroyed or set to null somewhere in your code. This can happen if you destroy the object, or if you set its reference to null in a script.

4. If you are trying to access a member of a script attached to a GameObject, make sure that the script has been added to the GameObject and that it is not disabled.

A null reference exception in Unity occurs when you are trying to access an object reference that is null, or not pointing to an instance of an object. This can happen if you have a public variable in your script that is not being set to an object in the Unity editor, or if you are trying to access an object that has been destroyed.

To fix a null reference exception, you need to make sure that the object reference is pointing to a valid object. This may involve setting the object in the Unity editor, or checking if the object has been destroyed before accessing it in your script.

Here is an example of how you might fix a null reference exception in Unity:

public GameObject myObject;

void Start()

{

    if (myObject != null)

    {

        // Access the object here

    }

    else

    {

        Debug.LogError("myObject is not set to an instance of an object!");

    }

}

In this example, we check if myObject is null before trying to access it. If it is null, we log an error message to the console. If it is not null, we can safely access the object and use it in our script.

I hope this helps! If you need more help, please provide more information about your code and the context in which the error is occurring.