SessionCompleteDelegates not firing?

[Artie]

First post since the new site so apologies if the formatting is broken or nonsensical.

In the UE5 multiplayer course with Kaan, in the online subsection bit,

if(SessionInterface.IsValid())//Tshared ptrs have a built in .IsValid() function
       {
            PrintString("Session interface is valid!");
            SessionInterface->OnCreateSessionCompleteDelegates.AddUObject(this, &UMultiplayerSessionsSubsystem::OnCreateSessionComplete); //& before function to get address of function function is now bound to this delegate

       }

and the subsequent function

void UMultiplayerSessionsSubsystem::OnCreateSessionComplete(FName SessionName, bool WasSuccessful)
{
    PrintString("test");
    PrintString(FString::Printf(TEXT("OnCreateSessionComplete: %d"), WasSuccessful));
} 

Never seem to fire.

When I run the program from the batch file and click on create server I can see the cmd screen dump session settings, but the game never seems to print out the bound delegate function.
I’m scratching my head wondering if this is a steam issue or a code issue.
Is there any way for me to debug this to see if it’s not completing correctly?

[beegeedee]

Hi artie and welcome to the community.

Just a few things to check before we get too caught up.

Are you using a steam config or null OSS?

Which version of unreal are you using?

Have you deleted the binaries and intermediate folders and rebuilt.

Lastly, try a packaged build and see if that works.

This may take a little back and forth to resolve but we will get there.

[Artie]

Hi, thank you. <3
Using a packaged build worked.
Do you know why this is the case?

[beegeedee]

I had this issue. When I created the CoopAdventure project I forgot to enable the plugin for steam OSS.

This prevented it working from command line.

Other things you can try is the -nosteam Switch and also exiting steam as this sometimes interferes with the OSS.