(0,0): error - System.NullReferenceException: Object reference not set to an instance of an object.

Unity Engine
1

hello I’ve been fighting with this exception for days. I’ve also started with the version change for gameobject from com.unity.netcode.gameobjects@1.0.0-pre.9 to com.unity.netcode.gameobjects@1.0.0-pre.8, com.unity.netcode.gameobjects@1.0 .0-pre.7 and at com.unity.netcode.gameobjects@1.0.0-pre.9 I get other exception… does anyone else have this?

(0,0): error - System.NullReferenceException: Object reference not set to an instance of an object.| at Unity.Netcode.Editor.CodeGen.INetworkSerializableILPP.Process(ICompiledAssembly compiledAssembly) in /Users/remziemyumyunova/Multiplayer/Library/PackageCache/com.unity.netcode.gameobjects@1.0.0-pre.9/Editor/CodeGen/INetworkSerializableILPP.cs:line 116 at Unity.Netcode.Editor.CodeGen.INetworkSerializableILPP.Process(ICompiledAssembly compiledAssembly) in /Users/remziemyumyunova/Multiplayer/Library/PackageCache/com.unity.netcode.gameobjects@1.0.0-pre.9/Editor/CodeGen/INetworkSerializableILPP.cs:line 116

I use this video as a source:

he is using 1.0.0.pre3 …

2

I’ve not seen it myself (still on pre7) but there’s posts here and here , and a Github issue raised here.

3

Hello, I have already seen these forum entries and unfortunately they did not help me…

4

I am facing the same issue. I am trying to fix it on my own with a bypass to the reference or something like that. let’s see if that helps. If yes, I will post the workaround here.

5

I had the same issue. I made a “NetSingleton” for NetworkBehaviors. I removed any inheritance to it but the error was still there. It wasn’t until I deleted the script that the error went away.

using UnityEngine;

public abstract class NetSingleton<T> : NetworkBehaviour where T : NetSingleton<T>
{
    public static T Instance { get; protected set; }
   
    public static bool InstanceExists => Instance != null;

    public static bool TryGetInstance(out T result)
    {
        result = Instance;

        return result != null;
    }

    protected virtual void Awake()
    {
        if (Instance != null)
        {
            Debug.LogWarningFormat("Trying to create a second instance of {0}", typeof(T));
            Destroy(gameObject);
        }
        else
        {
            Instance = (T)this;
            DontDestroyOnLoad(gameObject);
        }
    }

    new protected virtual void OnDestroy()
    {
        if (Instance == this)
        {
            Instance = null;
        }
        base.OnDestroy();
    }
}
6

The latest Photon SDK must be Unity version 2021.3 or later to be able to do this. When you encounter this pitfall, earlier versions of Unity will report various errors

7

The issue exists only when I create a generic type singleton with a NetworkBehaviour. If you change the NetworkBehaviour to MonoBehaviour, the error won’t pop up.

1 Like