Hey all,
like the title says i try to call “find advanced sessions” in the player state (on server) but it does not fail and does not succed either. This is really a bummer because it worked a few days ago and i didnt change anything in this part of the game … does someone know why the call returns nothing at all? It always prints “PLAYER STATE: UUUHM” …
Best regards,
M
Did you always have this “print string” in the out? Because the way it’s set up currently, your blueprint will always end up printing the “player state uhmm” because it’s in the output.
Could you also show the logs on when your “find session advanced” is called so we can see what’s happening at that point?
Output Log:
FUdpSocketBuilder: Failed to create and initialize socket UdpMessageMulticastSocket (last error: 0)
LogUdpMessaging: Warning: StartTransport failed to create multicast socket on 0.0.0.0:0, joined to 230.0.0.1:6666 with TTL 1
LogUdpMessaging: Warning: UDP messaging encountered an error. Auto repair routine started for reinitialization
LogBlueprintUserMessages: [GameInfoInstance_C_1] Client 0: LobbySaveGameExists?: false
LogBlueprintUserMessages: [GameInfoInstance_C_1] Client 0: SEARCH GAMES CALLED
LogBlueprintUserMessages: [PreLobbyPlayerController_C_0] Client 0: GET SESSIONS CALLED
LogBlueprintUserMessages: [PreLobbyPlayerState_C_0] Client 0: PLAYER STATE: PLAYER CONTROLLER VALID
LogOnline: Warning: OSS: Failed to send discovery broadcast SE_EHOSTUNREACH
LogBlueprintUserMessages: [PreLobbyPlayerState_C_0] Client 0: PLAYER STATE: FAILURE COULD NOT GET SESSIONS
LogBlueprintUserMessages: [PreLobbyPlayerState_C_0] Client 0: PLAYER STATE: UUUHM: 0
FUdpSocketBuilder: Failed to subscribe UdpMessageMulticastSocket to multicast group 230.0.0.1 on interface 0.0.0.0
FUdpSocketBuilder: Failed to create and initialize socket UdpMessageMulticastSocket (last error: 0)
LogUdpMessaging: Warning: StartTransport failed to create multicast socket on 0.0.0.0:0, joined to 230.0.0.1:6666 with TTL 1
LogUdpMessaging: Warning: UDP messaging encountered an error. Auto repair routine started for reinitialization
FUdpSocketBuilder: Failed to subscribe UdpMessageMulticastSocket to multicast group 230.0.0.1 on interface 0.0.0.0
FUdpSocketBuilder: Failed to create and initialize socket UdpMessageMulticastSocket (last error: 0)
LogUdpMessaging: Warning: StartTransport failed to create multicast socket on 0.0.0.0:0, joined to 230.0.0.1:6666 with TTL 1
LogUdpMessaging: Warning: UDP messaging encountered an error. Auto repair routine started for reinitialization
FUdpSocketBuilder: Failed to subscribe UdpMessageMulticastSocket to multicast group 230.0.0.1 on interface 0.0.0.0
FUdpSocketBuilder: Failed to create and initialize socket UdpMessageMulticastSocket (last error: 0)
LogUdpMessaging: Warning: StartTransport failed to create multicast socket on 0.0.0.0:0, joined to 230.0.0.1:6666 with TTL 1
LogUdpMessaging: Warning: UDP messaging encountered an error. Auto repair routine started for reinitialization
FUdpSocketBuilder: Failed to subscribe UdpMessageMulticastSocket to multicast group 230.0.0.1 on interface 0.0.0.0
FUdpSocketBuilder: Failed to create and initialize socket UdpMessageMulticastSocket (last error: 0)
yea if i only connect the “On Sucess” and “On Failure” node (and not the execution pin) nothing gets printed. How can that be? In my understanding the “Find Seesions Advanced” call has to succed or fail in any case right?
digging a little more into it it seems like the error:
FUdpSocketBuilder: Failed to subscribe UdpMessageMulticastSocket to multicast group 230.0.0.1 on interface 0.0.0.0
is well know but it seems like noone has a fix for it ?!? for some magical reasons it works perfectly if i turn on my VPN. Can someone pls explain what is going on and where i can find a fix?
I had the same issue and struggled for hour, then I found out that my firewall actually blocked Unreal Engine connexion to the 7777 port. A quick fix was to tempory disable my firewall during test.
Don’t know if that could be the begin of an answer for you, but I’m sure there’s a lot of people out there who will have the same probleme. 
I had the same issue and like heavyl said, it was a Firewall issue ! So I desactivated the firewall and it works. Thank you !
