[Crash] Unreal engine 4 project not starting after udp messanging change

Development Programming & Scripting Multiplayer & Networking
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1

When i was messing around with the UDP Messaging plugin (the tunnel part) on “ShooterGame” the engine crashed and now the project doesn’t want to re-open anymore i getting this:

!Id:a19fe66ebfe5f705959850440a8e992b

Access violation - code c0000005 (first/second chance not available)

UE4Editor-UdpMessaging.dll

UE4Editor_UdpMessaging + 35073 bytes
UE4Editor_UdpMessaging + 104451 bytes
UE4Editor_UdpMessaging + 124067 bytes
UE4Editor_UdpMessaging + 132728 bytes
UE4Editor_Core + 1807071 bytes
UE4Editor_Projects + 76073 bytes
UE4Editor_Projects + 76504 bytes
UE4Editor!FEngineLoop::LoadStartupModules() + 56 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\launchengineloop.cpp:1723]
UE4Editor!FEngineLoop::PreInit() + 11550 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\launchengineloop.cpp:1302]
UE4Editor!GuardedMain() + 236 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\launch.cpp:111]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\windows\launchwindows.cpp:125]
UE4Editor!WinMain() + 249 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.2\engine\source\runtime\launch\private\windows\launchwindows.cpp:207]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

is there a way to fix this?

Also while i’m on the subject of networking, how do i make it so the clients look for a specific ip address as host? (e.g 95.xx.xxx.xx) and what ports would be needed to be open in the firewall?

2

Hi ,

I’m using the 4.2 build and am not able to reproduce this. I enabled the plugin, saved, closed reopened. No issue. I did the same again with using some random ip addresses. Save, closed, reopened no issue.

Is this only happening on ShooterGame? If so, have you tried deleting the project file and re-downloading from the marketplace to see if this resolves the issue?

Thank you!

Tim

3

i changed the bottom option of the udp settings (tunneling) used my external ip address, also i did a lot of work on both map and blueprint settings, so i don’t know if deleting the project file is a good idea cause it’ll set me back for a few weeks of work

4

Hi ,

If you are still having this issue can you post the log file here?

Use this info to do so:

If you are experiencing a crash, then
please provide us with the .LOG and
.DMP files from your
[project]\Saved\Logs folder.
Additionally, you can please send us
the CrashReportClient.log file located
in C:\Program Files\Unreal
Engine\4.0\Engine\Programs\CrashReportClient\Saved\Logs.

Can you also post a copy of the DxDiag? This can be found by going to your command prompt > type in dxdiag > save information as text.

I’ve not been able to reproduce this at all just changing the settings.

Have you tried doing this in any project where you’re not changing settings within Blueprints and the map? If so, that would be a good place for me to start as I’m not able to progress with this at the moment. When I get your Log I will have a look and see if we can figure out where the hitch is happening.

Thank you!

Tim

5

I fixed it using the long way around (removing the project entirely, creating a new version and drag ‘n’ drop the content folder back into it)

Tough i do still have a backup of the broken one, so you guys can see what went wrong and maybe fix it in future versions

If needed i could also provide the original project file that was being affected

With kind regards

6

Hi,

I’ve converted your comment to an answer since it resolved your issue. Thank you for providing the files!

Thank you!

Tim

7

Hello ,
I am also trying to resolve the UDP Messaging in my project…Could you post your working example UDP Messaging files? I am really baffled with the issues that I am having now… Thank you very much!!!