Question "[MLAPI] Var data read too far. 1 bytes." When spawning client player prefab

When joining a server, the client will spawn the player prefab from other players, but will not spawn it's own prefab.

I get

[MLAPI] Var data read too far. 1 bytes.

[MLAPI] Var data read too little. 15 bytes.

[MLAPI] Failed to create object locally. [PrefabHash=0]. Hash could not be found. Is the prefab registered?

So it seems the data stream is getting messed up somehow, but how? I tested a simpler player prefab and it spawned fine, what cold I have possibly done to the prefab to get this kind of behaviour?

Full errors:


[MLAPI] Var data read too far. 1 bytes.
UnityEngine.Debug:LogWarning(Object)
MLAPI.Logging.NetworkLog:LogWarning(String)
MLAPI.NetworkedBehaviour:SetNetworkedVarData(List`1, Stream)
MLAPI.NetworkedObject:SetNetworkedVarData(Stream)
MLAPI.Spawning.SpawnManager:SpawnNetworkedObjectLocally(NetworkedObject, UInt64, Boolean, Boolean, Nullable`1, Stream, Boolean, Int32, Boolean, Boolean)
MLAPI.Messaging.InternalMessageHandler:<HandleConnectionApproved>g__DelayedSpawnAction|4_0(Stream)
MLAPI.Messaging.InternalMessageHandler:HandleConnectionApproved(UInt64, Stream, Single)
MLAPI.NetworkingManager:HandleIncomingData(UInt64, String, ArraySegment`1, Single, Boolean)
MLAPI.NetworkingManager:HandleRawTransportPoll(NetEventType, UInt64, String, ArraySegment`1, Single)
MLAPI.NetworkingManager:Update()


[MLAPI] Var data read too little. 15 bytes.
UnityEngine.Debug:LogWarning(Object)
MLAPI.Logging.NetworkLog:LogWarning(String)
MLAPI.NetworkedBehaviour:SetNetworkedVarData(List`1, Stream)
MLAPI.NetworkedObject:SetNetworkedVarData(Stream)
MLAPI.Spawning.SpawnManager:SpawnNetworkedObjectLocally(NetworkedObject, UInt64, Boolean, Boolean, Nullable`1, Stream, Boolean, Int32, Boolean, Boolean)
MLAPI.Messaging.InternalMessageHandler:<HandleConnectionApproved>g__DelayedSpawnAction|4_0(Stream)
MLAPI.Messaging.InternalMessageHandler:HandleConnectionApproved(UInt64, Stream, Single)
MLAPI.NetworkingManager:HandleIncomingData(UInt64, String, ArraySegment`1, Single, Boolean)
MLAPI.NetworkingManager:HandleRawTransportPoll(NetEventType, UInt64, String, ArraySegment`1, Single)
MLAPI.NetworkingManager:Update()


[MLAPI] Failed to create object locally. [PrefabHash=0]. Hash could not be found. Is the prefab registered?
UnityEngine.Debug:LogError(Object)
MLAPI.Logging.NetworkLog:LogError(String)
MLAPI.Spawning.SpawnManager:CreateLocalNetworkedObject(Boolean, UInt64, UInt64, Nullable`1, Nullable`1, Nullable`1)
MLAPI.Messaging.InternalMessageHandler:<HandleConnectionApproved>g__DelayedSpawnAction|4_0(Stream)
MLAPI.Messaging.InternalMessageHandler:HandleConnectionApproved(UInt64, Stream, Single)
MLAPI.NetworkingManager:HandleIncomingData(UInt64, String, ArraySegment`1, Single, Boolean)
MLAPI.NetworkingManager:HandleRawTransportPoll(NetEventType, UInt64, String, ArraySegment`1, Single)
MLAPI.NetworkingManager:Update()

 

How many and what type of NetworkVariables do you have on your player prefab? If you are using a custom INetworkSerialiazable that could be causing issues like that if there is a mistake in your serialization code.

Besides that the only thing which comes to mind which could be causing this is a rare race condition we found which corrupts the data stream on the client while deserializing.

 

Thank for the reply!

Turns out I had make some NetworkedArrays of a custom INetworkSerialiazable class for testing purposes and removing those fixed the problem. It's weird though because the problem started happening long after I had created them (an update maybe?), anyway it's fixed, thanks for the suggestions.