Bug?

Unity Engine
1

Two random errors while trying to figure out Netcode:

KeyNotFoundException: The given key was not present in the dictionary.
System.Collections.Generic.Dictionary2[TKey,TValue].get_Item (TKey key) (at <695d1cc93cca45069c528c15c9fdd749>:0) Unity.Netcode.NetworkManager.TransportIdToClientId (System.UInt64 transportId) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:1648) Unity.Netcode.NetworkManager.HandleRawTransportPoll (Unity.Netcode.NetworkEvent networkEvent, System.UInt64 clientId, System.ArraySegment1[T] payload, System.Single receiveTime) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:1725)
Unity.Netcode.NetworkManager.OnNetworkEarlyUpdate () (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:1537)
Unity.Netcode.NetworkManager.NetworkUpdate (Unity.Netcode.NetworkUpdateStage updateStage) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:1473)
Unity.Netcode.NetworkUpdateLoop.RunNetworkUpdateStage (Unity.Netcode.NetworkUpdateStage updateStage) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkUpdateLoop.cs:185)
Unity.Netcode.NetworkUpdateLoop+NetworkEarlyUpdate+<>c.b__0_0 () (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkUpdateLoop.cs:208)

NullReferenceException: Object reference not set to an instance of an object
FirstPersonMovement.OnNetworkSpawn () (at Assets/Mini First Person Controller/Scripts/FirstPersonMovement.cs:35)
Unity.Netcode.NetworkBehaviour.InternalOnNetworkSpawn () (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkBehaviour.cs:439)
Unity.Netcode.NetworkObject.InvokeBehaviourNetworkSpawn () (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkObject.cs:817)
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@1.0.2/Runtime/Spawning/NetworkSpawnManager.cs:552)
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@1.0.2/Runtime/Spawning/NetworkSpawnManager.cs:453)
Unity.Netcode.NetworkManager.HandleConnectionApproval (System.UInt64 ownerClientId, Unity.Netcode.NetworkManager+ConnectionApprovalResponse response) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:2044)
Unity.Netcode.ConnectionRequestMessage.Handle (Unity.Netcode.NetworkContext& context) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/Messages/ConnectionRequestMessage.cs:121)
Unity.Netcode.MessagingSystem.ReceiveMessage[T] (Unity.Netcode.FastBufferReader reader, Unity.Netcode.NetworkContext& context, Unity.Netcode.MessagingSystem system) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/MessagingSystem.cs:457)
Unity.Netcode.MessagingSystem.HandleMessage (Unity.Netcode.MessageHeader& header, Unity.Netcode.FastBufferReader reader, System.UInt64 senderId, System.Single timestamp, System.Int32 serializedHeaderSize) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/MessagingSystem.cs:387)
UnityEngine.Debug:LogException(Exception)
Unity.Netcode.MessagingSystem:HandleMessage(MessageHeader&, FastBufferReader, UInt64, Single, Int32) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/MessagingSystem.cs:391)
Unity.Netcode.MessagingSystem:ProcessIncomingMessageQueue() (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/MessagingSystem.cs:407)
Unity.Netcode.NetworkManager:OnNetworkEarlyUpdate() (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:1541)
Unity.Netcode.NetworkManager:NetworkUpdate(NetworkUpdateStage) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:1473)
Unity.Netcode.NetworkUpdateLoop:RunNetworkUpdateStage(NetworkUpdateStage) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkUpdateLoop.cs:185)
Unity.Netcode.<>c:b__0_0() (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkUpdateLoop.cs:208)

Guess Netcode isn’t for me right now.

2

Just posting error messages without any context isn’t helpful.

The second error is almost certainly not a Netcode issue.
The first could be a bug, but could just as well be an issue caused by using Netcode incorrectly. That’s impossible to say without context.

3

Maybe I’m a sucker for punishment, still trying to figure this out but:

ArgumentException: An item with the same key has already been added. Key: 1
System.Collections.Generic.Dictionary2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) (at <695d1cc93cca45069c528c15c9fdd749>:0) System.Collections.Generic.Dictionary2[TKey,TValue].Add (TKey key, TValue value) (at <695d1cc93cca45069c528c15c9fdd749>:0)
Unity.Netcode.NetworkManager.HandleConnectionApproval (System.UInt64 ownerClientId, Unity.Netcode.NetworkManager+ConnectionApprovalResponse response) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:2030)
Unity.Netcode.ConnectionRequestMessage.Handle (Unity.Netcode.NetworkContext& context) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/Messages/ConnectionRequestMessage.cs:121)
Unity.Netcode.MessagingSystem.ReceiveMessage[T] (Unity.Netcode.FastBufferReader reader, Unity.Netcode.NetworkContext& context, Unity.Netcode.MessagingSystem system) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/MessagingSystem.cs:457)
Unity.Netcode.MessagingSystem.HandleMessage (Unity.Netcode.MessageHeader& header, Unity.Netcode.FastBufferReader reader, System.UInt64 senderId, System.Single timestamp, System.Int32 serializedHeaderSize) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/MessagingSystem.cs:387)
UnityEngine.Debug:LogException(Exception)
Unity.Netcode.MessagingSystem:HandleMessage(MessageHeader&, FastBufferReader, UInt64, Single, Int32) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/MessagingSystem.cs:391)
Unity.Netcode.MessagingSystem:ProcessIncomingMessageQueue() (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Messaging/MessagingSystem.cs:407)
Unity.Netcode.NetworkManager:OnNetworkEarlyUpdate() (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:1541)
Unity.Netcode.NetworkManager:NetworkUpdate(NetworkUpdateStage) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkManager.cs:1473)
Unity.Netcode.NetworkUpdateLoop:RunNetworkUpdateStage(NetworkUpdateStage) (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkUpdateLoop.cs:185)
Unity.Netcode.<>c:b__0_0() (at Library/PackageCache/com.unity.netcode.gameobjects@1.0.2/Runtime/Core/NetworkUpdateLoop.cs:208)

I have no idea what this even means. The error is not at all helpful.

4

There’s a chance the above was caused by running a newer build in the editor with a slightly older build outside of it instead of running both with the same build. But not 100% sure.

5

It has something to do with connection approval. It would help if you posted the code you wrote for that event and the settings of the NetworkManager.

6

NetworkManager: Imgur: The magic of the Internet

if(netManager.StartHost()) gameclass.AddNotification("Host started");
else gameclass.AddNotification("Host start FAILED");

netTransport.ConnectToSteamID = (Host's Steam ID number here);
if(netManager.StartClient()) gameclass.AddNotification("Client start SUCCESS");
else gameclass.AddNotification("Client start FAILED");