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Error connecting to a lobby using steam (networking related)

This is based on this project: link text

Everything works just fine and dandy with the lobby in an isolated project. But after migrating this project into a different one, the lobby will no longer successfully launch.

I get these errors:

LogNet: Warning: Failed to init net driver ListenURL: /Game/MenuSystem/Maps/Lobby?listen: SteamSockets: binding to port 7777 failed (0)

LogNet: Warning: Network Failure: GameNetDriver[NetDriverListenFailure]: SteamSockets: binding to port 7777 failed

LogNet: NetworkFailure: NetDriverListenFailure, Error: 'SteamSockets: binding to port 7777 failed (0)'

LogBlueprintUserMessages: [GameinfoInstance_C_0] even network error on server

LogWorld: Failed to listen: SteamSockets: binding to port 7777 failed (0)

LogNet: Error: LoadMap: failed to Listen(/Game/MenuSystem/Maps/Lobby?listen)

What the heck would cause this? Absolutely nothing was changed or altered about the gameinstance or in any of the player controllers.

Product Version: UE 4.20
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asked Oct 02 '18 at 03:05 AM in Using UE4

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avatar image mightyenigma Nov 23 '18 at 01:42 AM

The only thing I can think of is that since you migrated it into a different project it may have a different configuration (like which onlinesubsystem it is using) and different plugins enabled. Try comparing the plugins and the ini files.

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i was missing a line in this somewhere that goes into DefaultEngine. Cant remember which one. But to anyone trying to hook into steam this code below goes in DefaultEngine.ini

[/Script/Engine.GameEngine] +NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="OnlineSubsystemUtils.IpNetDriver")

[OnlineSubsystem] PollingIntervalInMs=20
; Uncomment the following line to use the Null Subsystem ;DefaultPlatformService=Null ; Uncomment the following lines to use the Steam Subsystem DefaultPlatformService=Steam

[OnlineSubsystemSteam] bEnabled=true
; This is to prevent subsystem from reading other achievements that may be defined in parent .ini Achievement_0_Id=""

[/Script/OnlineSubsystemSteam.SteamNetDriver] NetConnectionClassName="OnlineSubsystemSteam.SteamNetConnection"

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answered Nov 23 '18 at 06:55 PM

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