Question NullReferenceException: Object reference not set to in Unity.Netcode.NetworkTransform

Title: NullReferenceException: Object reference not set to an instance of an object in Unity.Netcode.NetworkTransform

Body: Hello Unity community,

I'm encountering an issue with my Unity project that involves the Unity.Netcode.NetworkTransform component. My game loads the lobby, relay, and player selection without any problems. However, when the game starts, the player isn't spawned, and I receive the following error:

kotlin
NullReferenceException: Object reference not set to an instance of an object
Unity.Netcode.Components.NetworkTransform.OnNetworkObjectParentChanged (Unity.Netcode.NetworkObject parentNetworkObject) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Components/NetworkTransform.cs:2529)
Unity.Netcode.NetworkObject.InvokeBehaviourOnNetworkObjectParentChanged (Unity.Netcode.NetworkObject parentNetworkObject) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Core/NetworkObject.cs:691)
Unity.Netcode.NetworkObject.ApplyNetworkParenting (System.Boolean removeParent, System.Boolean ignoreNotSpawned) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Core/NetworkObject.cs:1015)
Unity.Netcode.NetworkSpawnManager.SpawnNetworkObjectLocallyCommon (Unity.Netcode.NetworkObject networkObject, System.UInt64 networkId, System.Boolean sceneObject, System.Boolean playerObject, System.UInt64 ownerClientId, System.Boolean destroyWithScene) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Spawning/NetworkSpawnManager.cs:596)
Unity.Netcode.NetworkSpawnManager.SpawnNetworkObjectLocally (Unity.Netcode.NetworkObject networkObject, System.UInt64 networkId, System.Boolean sceneObject, System.Boolean playerObject, System.UInt64 ownerClientId, System.Boolean destroyWithScene) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Spawning/NetworkSpawnManager.cs:502)
Unity.Netcode.NetworkSceneManager.OnServerLoadedScene (System.UInt32 sceneEventId, UnityEngine.SceneManagement.Scene scene) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/SceneManagement/NetworkSceneManager.cs:1630)
Unity.Netcode.NetworkSceneManager.OnSceneLoaded (System.UInt32 sceneEventId) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/SceneManagement/NetworkSceneManager.cs:1600)
Unity.Netcode.SceneEventProgress.<SetAsyncOperation>b__37_0 (UnityEngine.AsyncOperation asyncOp2) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/SceneManagement/SceneEventProgress.cs:262)
UnityEngine.AsyncOperation.InvokeCompletionEvent () (at <3e2118a0a67041869c87922a11f4a02f>:0)

I'm using Unity version 2023.1.6 and Unity.Netcode version 1.5.2. I haven't made any recent changes that I'm aware of, and this problem seemed to occur suddenly.

Could someone please help me understand what might be causing this issue and how I can resolve it? I'd greatly appreciate any insights or suggestions to troubleshoot and fix this problem.

Thank you in advance for your assistance.

 

day after the game still being imparied because this error- ithink the main damage is that the player is not spaend after the rely and lobby. (it worked for a long time and suddeny it stoped)

 

Same for me. It used to work and today it does not anymore. I have recently made an update and the NetworkManager Component ask to make a small change on network prefabs which became a list that as to be set somewhere in the project (maybe this is related to this). I've noticed also that an upgrade of netcodeforgameobject was available maybe one needs to upgrade this package ??

 

It is strange because the error
(for me it is
NullReferenceException: Object reference not set to an instance of an object
Unity.Netcode.Components.NetworkTransform.OnNetworkObjectParentChanged (Unity.Netcode.NetworkObject parentNetworkObject) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.1/Components/NetworkTransform.cs:2516)
), points towards this line in the NetworkTransform.cs script : m_ScaleInterpolator.Clear();
I am using the script ClientNetworkTransform for syncing the transform in my network prefab

 

Hello! has anyone figured out what the problem is by now? i have the exact same problem following codemonkey tutorial at this point:

I cannot find the solution to this. Any hints would be greatly appreciated:

Code (CSharp):

1. NullReferenceException: Object reference not set to an instance of an object
2. Unity.Netcode.Components.NetworkTransform.OnNetworkObjectParentChanged (Unity.Netcode.NetworkObject parentNetworkObject) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.6.0/Components/NetworkTransform.cs:2624)
3. Unity.Netcode.NetworkObject.InvokeBehaviourOnNetworkObjectParentChanged (Unity.Netcode.NetworkObject parentNetworkObject) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.6.0/Runtime/Core/NetworkObject.cs:691)
4. Unity.Netcode.NetworkObject.ApplyNetworkParenting (System.Boolean removeParent, System.Boolean ignoreNotSpawned) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.6.0/Runtime/Core/NetworkObject.cs:1015)
5. Unity.Netcode.NetworkSpawnManager.SpawnNetworkObjectLocallyCommon (Unity.Netcode.NetworkObject networkObject, System.UInt64 networkId, System.Boolean sceneObject, System.Boolean playerObject, System.UInt64 ownerClientId, System.Boolean destroyWithScene) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.6.0/Runtime/Spawning/NetworkSpawnManager.cs:596)
6. Unity.Netcode.NetworkSpawnManager.SpawnNetworkObjectLocally (Unity.Netcode.NetworkObject networkObject, System.UInt64 networkId, System.Boolean sceneObject, System.Boolean playerObject, System.UInt64 ownerClientId, System.Boolean destroyWithScene) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.6.0/Runtime/Spawning/NetworkSpawnManager.cs:502)
7. Unity.Netcode.NetworkSceneManager.OnServerLoadedScene (System.UInt32 sceneEventId, UnityEngine.SceneManagement.Scene scene) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.6.0/Runtime/SceneManagement/NetworkSceneManager.cs:1630)
8. Unity.Netcode.NetworkSceneManager.OnSceneLoaded (System.UInt32 sceneEventId) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.6.0/Runtime/SceneManagement/NetworkSceneManager.cs:1600)
9. Unity.Netcode.SceneEventProgress.<SetAsyncOperation>b__37_0 (UnityEngine.AsyncOperation asyncOp2) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.6.0/Runtime/SceneManagement/SceneEventProgress.cs:262)
10. UnityEngine.AsyncOperation.InvokeCompletionEvent () (at <cd14705e8f094afcb566740ab5e8c02d>:0)
11.  

Thank you very much!

 

I have this problem here, and i also dont know how i can fix this problem:

Code (CSharp):

1. NullReferenceException: Object reference not set to an instance of an object
2. Unity.Netcode.Components.NetworkTransform.OnNetworkObjectParentChanged (Unity.Netcode.NetworkObject parentNetworkObject) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Components/NetworkTransform.cs:2529)
3. Unity.Netcode.NetworkObject.InvokeBehaviourOnNetworkObjectParentChanged (Unity.Netcode.NetworkObject parentNetworkObject) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Core/NetworkObject.cs:691)
4. Unity.Netcode.NetworkObject.ApplyNetworkParenting (System.Boolean removeParent, System.Boolean ignoreNotSpawned) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Core/NetworkObject.cs:1015)
5. Unity.Netcode.NetworkSpawnManager.SpawnNetworkObjectLocallyCommon (Unity.Netcode.NetworkObject networkObject, System.UInt64 networkId, System.Boolean sceneObject, System.Boolean playerObject, System.UInt64 ownerClientId, System.Boolean destroyWithScene) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Spawning/NetworkSpawnManager.cs:596)
6. Unity.Netcode.NetworkSpawnManager.SpawnNetworkObjectLocally (Unity.Netcode.NetworkObject networkObject, System.UInt64 networkId, System.Boolean sceneObject, System.Boolean playerObject, System.UInt64 ownerClientId, System.Boolean destroyWithScene) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Spawning/NetworkSpawnManager.cs:502)
7. Unity.Netcode.NetworkConnectionManager.HandleConnectionApproval (System.UInt64 ownerClientId, Unity.Netcode.NetworkManager+ConnectionApprovalResponse response) (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Connection/NetworkConnectionManager.cs:609)
8. Unity.Netcode.NetworkManager.HostServerInitialize () (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Core/NetworkManager.cs:892)
9. Unity.Netcode.NetworkManager.StartHost () (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Core/NetworkManager.cs:848)
10. UnityEngine.Debug:LogException(Exception)
11. Unity.Netcode.NetworkManager:StartHost() (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Runtime/Core/NetworkManager.cs:853)
12. Unity.Netcode.Editor.NetworkManagerEditor:OnInspectorGUI() (at ./Library/PackageCache/com.unity.netcode.gameobjects@1.5.2/Editor/NetworkManagerEditor.cs:292)
13. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)