Build failing on Windows 11 Unreal Engine 5.7.1 (Source Build)

[draicor]

Hey there, new follower here, amazing plugin!

I tried to compile the plugin from source, and it wouldn't work, I was getting this error:

Plugins\EOSIntegrationKit\Source\OnlineSubsystemEIK\Subsystem\EIK_Subsystem.cpp(1115): error C4702: unreachable code
2> while compiling UEIK_Subsystem::OnJoinSessionCompleted

So I edited the function definition and the error went away, and it works for Unreal Engine 5.7.1 now.
Here is the fixed version, maybe you could test it and if it works, then add it to the project.

void UEIK_Subsystem::OnJoinSessionCompleted(FName SessionName, EOnJoinSessionCompleteResult::Type Result)
{
    bool bSuccess = false;
    
    if(Result == EOnJoinSessionCompleteResult::Success)
    {
        if(APlayerController* PlayerControllerRef = UGameplayStatics::GetPlayerController(GetWorld(), 0))
        {
            if(const IOnlineSubsystem* SubsystemRef = IOnlineSubsystem::Get())
            {
                if(const IOnlineSessionPtr SessionPtrRef = SubsystemRef->GetSessionInterface())
                {
                    FString JoinAddress;
                    SessionPtrRef->GetResolvedConnectString(SessionName, JoinAddress);
                    
                    if(Local_bIsDedicatedServerSession)
                    {
                        TArray<FString> IpPortArray;
                        JoinAddress.ParseIntoArray(IpPortArray, TEXT(":"), true);
                        
                        if(IpPortArray.Num() > 0)
                        {
                            const FString IpAddress = IpPortArray[0];
                            if(LocalPortInfo.IsEmpty())
                            {
                                LocalPortInfo = "7777";
                            }
                            const FString NewCustomIP = IpAddress + ":" + LocalPortInfo;
                            JoinAddress = NewCustomIP;
                        }
                    }
                    
                    if(!JoinAddress.IsEmpty())
                    {
                        PlayerControllerRef->ClientTravel(JoinAddress, ETravelType::TRAVEL_Absolute);
                        bSuccess = true;
                    }
                }
            }
        }
    }
    else
    {
        UE_LOG(LogTemp, Error, TEXT("Join Session Error with Reason of %d"), Result);
    }
    
    JoinSession_CallbackBP.ExecuteIfBound(bSuccess);
}

[lmliota]

It compiled successfully. My edit using AI (I have absolutely no programming experience :D)

void UEIK_Subsystem::OnJoinSessionCompleted(FName SessionName, EOnJoinSessionCompleteResult::Type Result)
{
    bool bSuccess = false;

    if (Result == EOnJoinSessionCompleteResult::Success)
    {
        if (APlayerController* PlayerControllerRef = UGameplayStatics::GetPlayerController(GetWorld(), 0))
        {
            if (const IOnlineSubsystem* SubsystemRef = IOnlineSubsystem::Get())
            {
                if (const IOnlineSessionPtr SessionPtrRef = SubsystemRef->GetSessionInterface())
                {
                    FString JoinAddress;

                    // Check if we successfully resolved the connection string
                    if (SessionPtrRef->GetResolvedConnectString(SessionName, JoinAddress) && !JoinAddress.IsEmpty())
                    {
                        // Only attempt to fix the port for dedicated servers (common issue: port resolves to 0)
                        if (Local_bIsDedicatedServerSession)
                        {
                            // Find the last colon to properly handle both IPv4 and IPv6 addresses
                            int32 LastColonIndex = INDEX_NONE;
                            if (JoinAddress.FindLastChar(TEXT(':'), LastColonIndex))
                            {
                                FString LeftPart = JoinAddress.Left(LastColonIndex);
                                FString PortPart = JoinAddress.Mid(LastColonIndex + 1);

                                // If the port is empty or "0", override it with our custom port (default: 7777)
                                if (PortPart.IsEmpty() || PortPart == TEXT("0"))
                                {
                                    FString PortToUse = LocalPortInfo.IsEmpty() ? TEXT("7777") : LocalPortInfo;
                                    JoinAddress = LeftPart + TEXT(":") + PortToUse;
                                }
                                // Otherwise, the port is already valid – leave it unchanged
                            }
                            // If there's no colon at all (e.g. Steam/EOS connect strings), do nothing – it's not an IP:Port format
                        }

                        // Travel to the server using the (possibly corrected) address
                        PlayerControllerRef->ClientTravel(JoinAddress, ETravelType::TRAVEL_Absolute);
                        bSuccess = true;
                    }
                }
            }
        }
    }
    else
    {
        UE_LOG(LogTemp, Error, TEXT("Join Session failed with result: %d"), (int32)Result);
    }

    // Fire the Blueprint callback only once, with the correct success/failure result
    JoinSession_CallbackBP.ExecuteIfBound(bSuccess);

[draicor]

It compiled successfully. My edit using AI (I have absolutely no programming experience :D)

void UEIK_Subsystem::OnJoinSessionCompleted(FName SessionName, EOnJoinSessionCompleteResult::Type Result)
{
    bool bSuccess = false;

    if (Result == EOnJoinSessionCompleteResult::Success)
    {
        if (APlayerController* PlayerControllerRef = UGameplayStatics::GetPlayerController(GetWorld(), 0))
        {
            if (const IOnlineSubsystem* SubsystemRef = IOnlineSubsystem::Get())
            {
                if (const IOnlineSessionPtr SessionPtrRef = SubsystemRef->GetSessionInterface())
                {
                    FString JoinAddress;

                    // Check if we successfully resolved the connection string
                    if (SessionPtrRef->GetResolvedConnectString(SessionName, JoinAddress) && !JoinAddress.IsEmpty())
                    {
                        // Only attempt to fix the port for dedicated servers (common issue: port resolves to 0)
                        if (Local_bIsDedicatedServerSession)
                        {
                            // Find the last colon to properly handle both IPv4 and IPv6 addresses
                            int32 LastColonIndex = INDEX_NONE;
                            if (JoinAddress.FindLastChar(TEXT(':'), LastColonIndex))
                            {
                                FString LeftPart = JoinAddress.Left(LastColonIndex);
                                FString PortPart = JoinAddress.Mid(LastColonIndex + 1);

                                // If the port is empty or "0", override it with our custom port (default: 7777)
                                if (PortPart.IsEmpty() || PortPart == TEXT("0"))
                                {
                                    FString PortToUse = LocalPortInfo.IsEmpty() ? TEXT("7777") : LocalPortInfo;
                                    JoinAddress = LeftPart + TEXT(":") + PortToUse;
                                }
                                // Otherwise, the port is already valid – leave it unchanged
                            }
                            // If there's no colon at all (e.g. Steam/EOS connect strings), do nothing – it's not an IP:Port format
                        }

                        // Travel to the server using the (possibly corrected) address
                        PlayerControllerRef->ClientTravel(JoinAddress, ETravelType::TRAVEL_Absolute);
                        bSuccess = true;
                    }
                }
            }
        }
    }
    else
    {
        UE_LOG(LogTemp, Error, TEXT("Join Session failed with result: %d"), (int32)Result);
    }

    // Fire the Blueprint callback only once, with the correct success/failure result
    JoinSession_CallbackBP.ExecuteIfBound(bSuccess);

you are right, this snippet is way safer too! thanks!