OnServerSceneChanged() not being called

I'm working on a networked project and I'm having an issue where I call ServerChangeScene() but OnServerSceneChanged() is not being called in response. Everything else, seems to be working perfectly- I can see the scene change happen on both clients. Both clients are set to NotReady() in response to the scene change, and I use OnLevelWasLoaded() to set them back to Ready. The server registers that both clients have been readied again.

My question is this: what conditions must be true for OnServerSceneChanged() to be called? It must be more then just "the level is completely loaded" because the level is getting completely loaded on every client and nothing is happening. What am I missing?

 

Only server will invoke this callback if you extend NetworkManager

Code (CSharp):

1.  
2.         private void FinishLoadScene()
3.         {
4.             if (this.client != null)
5.             {
6.                 if (NetworkManager.s_ClientReadyConnection != null)
7.                 {
8.                     this.OnClientConnect(NetworkManager.s_ClientReadyConnection);
9.                     NetworkManager.s_ClientReadyConnection = null;
10.                 }
11.             }
12.             else if (LogFilter.logDev)
13.             {
14.                 Debug.Log("FinishLoadScene client is null");
15.             }
16.             if (NetworkServer.active)
17.             {
18.                 NetworkServer.SpawnObjects();
19.                 this.OnServerSceneChanged(NetworkManager.networkSceneName);
20.             }
21.             if (this.IsClientConnected() && this.client != null)
22.             {
23.                 this.RegisterClientMessages(this.client);
24.                 this.OnClientSceneChanged(this.client.connection);
25.             }
26.         }

 

Hi chenyuchih, thank you for your reply! All of my code is in a script that does extend NetworkManager, so that shouldn't be a problem. I also check to make sure NetworkServer.active is true right before calling ServerChangeScene(), so it should be calling OnServerSceneChanged().

I was able to write code to manually call OnServerSceneChanged, but I'd like to know why it no longer happens automatically.

 

Hi Eihiko.
OnServerSceneChanged is a callback of NetworkManager not a callback of NetworkBehavior or Monobehavior. If your OnServerSceneChanged is in a script without extending NetworkManager, you may need to call it from "NetworkManager.OnServerSceneChanged" by yourself

 

Like I said, I DID extend NetworkManager.

 

Maybe you forgot "override" modifier?
I make a test with unity 5.2.2p4. If I don't add override modifier, OnServerSceneChanged won't be invoked.

 

I also have the same issue with OnServerSceneChanged not being called. Here is my code.

Code (csharp):

1.  
2. public class BatNetworkManager : NetworkManager
3. {
4.     private void Awake()
5.     {
6.         //THIS CAUSES THE BUG!!!  Do not call Awake()!!!!
7.     }
8.     public override void OnServerSceneChanged(string sceneName)
9.     {
10.      
11.         Debug.Log("OnServerSceneChanged called");
12.     }
13. }
14.  

 

I do have the override modifier, so that's not the issue either. Sorry to hear you're having the same problem, Zullar :c

 

Hi Eihiko and Zullar. Can you upload your project as a file?

 

I *just* figured out what the issue was. I have a custom child NetworkManager where I called Awake(). Calling Awake() seems to override Unity's default NetworkManager initialization and causes various bugs such as:
-NetworkManager.singleton not being set
-SceneObjects not spawning (NetworkServer.SpawnObjects() isn't automatically called)
-NetworkServer.OnServerSceneChanged() does not get called

Hope this helps. It took me forever to track down this bug!

I did a bug report and post here
http://forum.unity3d.com/threads/unet-scene-objects-not-spawning-w-custom-networkmanager.369236/

 

HI. I know this post is really old. I am facing the same error in Mirror which is a community run equivalent for Unet. Stuck in this for weeks. I don't have an awake method in my custom networkManager. Someone Help.