RTCData Send data failed. ResultCode=[4008] LocalProductUserId=[000...e3c] RoomName=[conf+222445068]

[Rifatgh]

11/12/2024 01:54:23 LogEOSRTC(Error): LibRTCCore: LibRtc::FDataChannelManager::PushData. Unknown conference or no outgoing data channel
my code is
public class EPICChatManager : MonoBehaviour
{
public static EPICChatManager Instance;
RTCDataInterface rtcDataHandle;
public Action<LobbyMemberData, string> OnDataReceive;
private ulong rtcNotificationID;

    private void Awake() 
    {
        if(Instance != null)
        {
            Destroy(gameObject);
            return;
        }    
        Instance = this;
    }
    void Start()
    {
        RTCInterface rtcHandle = EOSManager.Instance.GetEOSRTCInterface();
        rtcDataHandle = rtcHandle.GetDataInterface();

        
        LobbyService.Instance.LobbyLeaved += RemoveNotifyForDataRecieve;
        LobbyService.Instance.OnLobbyDataUpdated += AddNotifyForDataReceive;
    }

    private void AddNotifyForDataReceive(Result result)
    {
        if(result == Result.Success)
        {
            AddNotifyDataReceivedOptions addNotifyDataReceivedOptions = new AddNotifyDataReceivedOptions();
            addNotifyDataReceivedOptions.LocalUserId = EOSManager.Instance.GetProductUserId();
            addNotifyDataReceivedOptions.RoomName = LobbyService.Instance.GetCurrentLobby.RTCRoomName;
            
            rtcNotificationID = rtcDataHandle.AddNotifyDataReceived(ref addNotifyDataReceivedOptions, null, OnAddNotifyDataReceive);
        }
    }

    private void RemoveNotifyForDataRecieve(Result result)
    {
        if(result == Result.Success)
        {
            rtcDataHandle.RemoveNotifyDataReceived(rtcNotificationID);
        }
        Debug.LogWarning("Failed to remove Notify Data Receive");
    }
    private void OnAddNotifyDataReceive(ref DataReceivedCallbackInfo data)
    {
        if(data.GetResultCode() == Result.Success)
        {
            LobbyMemberData memberData = LobbyService.Instance.FindMemberByProductUserId(data.ParticipantId);
            string msg = Encoding.UTF8.GetString(data.Data);
            OnDataReceive?.Invoke(memberData, msg);
        }
    }

    public void SendData(string message)
    {
        if(string.IsNullOrWhiteSpace(message)) 
        {
            return;
        }
        if(LobbyService.Instance.GetCurrentLobby.Members.Count <= 1)
        {
         
            return;
        }
   
            SendDataOptions sendDataOptions = new SendDataOptions();
            sendDataOptions.Data = Encoding.UTF8.GetBytes(message);
            sendDataOptions.LocalUserId = EOSManager.Instance.GetProductUserId();
            sendDataOptions.RoomName = LobbyService.Instance.GetCurrentLobby.RTCRoomName;
            Debug.Log(LobbyService.Instance.GetCurrentLobby.RTCRoomName + " Room name");

            Debug.Log("Sending Data");

            rtcDataHandle.SendData(ref sendDataOptions);
    }
}

[WispyMouse]

Ahoy! Let's try and figure this out. Firstly, what version of Unity are you using, and what release version of the EOS Plugin for Unity are you using?

It sounds like the error you're getting comes immediately after calling "SendData" in the above code, correct? That suggests you do indeed have a current lobby, and that it was correctly made. EOSLobbyManager.OnCreateLobbyCompleted should run SubscribeToRTCEvents, can you make sure it's calling that? Can you check for any logs that are called by this function?

[WispyMouse]

I want to double check on that version number. Is the Release of the EOS Plugin for Unity "3.2.2"? I don't see a Release with this number, perhaps you're using "3.3.2"?

The documentation for setting up an RTC-data Service is here: https://dev.epicgames.com/docs/game-services/real-time-communication-interface/rtc-data-interface#set-up-the-rtc-data-service

It looks like our own samples for EOS Plugin for Unity don't yet have a full demonstration of setting up an RTC Room. This is a priority for the near future, and will be worked on soon! In the meantime, let's work together to try and figure out the missing steps. The documentation above has a bit of nuance, because JoinRoom should automatically be handled for Lobby RTC rooms.

The documentation mentions running AddNotifyDataReceived, which you have in the first bit of code you shared in this ticket. Can you ensure that AddNotifyForDataReceive is running by adding a logging statement to that method?

The other thing that the documentation mentions is running UpdateReceiving and UpdateSending, inside the RTCDataInterface. While I would expect these to default to being on, try running them with Options that note that they should be open. There's a DataOpen argument for both, set that to true.

After all of AddNotifyDataReceived, UpdateReceiving and UpdateSending are all run to completion, then try using SendData. I hope this helps!

[Rifatgh]

Sorry, It's 3.3.2.
I have done so. It's not working and giving same error

[WispyMouse]

Unfortunate! I'll spend some time today and tomorrow trying to replicate your issue, and to see if I can encounter what you're getting.

Just to make sure, did you ensure that AddNotifyForDataReceive is running before you run SendData?

[Rifatgh]

AddNotifyForDataReceive is running before you run SendData? Done in previous :(

can you create a sample for RTCDataInterface. :)

[WispyMouse]

Absolutely, making a sample for the RTCDataInterface is one of my next top priorities! 😄 I have a document to present internally about the details of the sample and how it'll be done. I expect it won't be ready until either this coming release, or the next release after. But as I make this sample in development, I'll come back to this Discussion when I'm far enough along to share some code.