following process has crashed: VsHub.exe

Development Programming & Scripting
1

Hi, I’m a games developer that just started with Unreal (our studio used to use Unity, as I’m a .NET developer).

Anyway, we’re in middle of developing a game, but we can’t play test it anymore. Everytime I try hitting Play button, being it Play on editor or outside, game crashes, with a nice " following process has crashed: VsHub.exe" and nothing more.

No debugging info. I’ll be downloading and building engine from source code to see if I get any more information out of this error.

It happens both on version 4.6.1 and 4.7 (preview).

I find it really weird, as VsHub is an executable from Visual Studio, but this project doesn’t have any source code. I don’t know how Unreal’s system works, but I think blueprints are actually C++ classes dynamically created…? I don’t know, it just doesn’t make sense.

EDIT: Restarting doesn’t solve. Opening/closing Visual Studio doesn’t solve. I have installed Visual Studio 2008, 2010, 2012, 2013 and 2015 preview. My pc is an i7 3770, 8gb, GTX 970

EDIT2: I just realised I can’t open any blueprints either. When I open a blueprint, it goes straight to that same screen.

2

Hi lucasassislar,

Please and attach crash logs for project after it crashes next time. They can be found in project folder under \Saved\Logs. And please be sure to Submit Crash Report with a brief description. Thanks!

3

I don’t think zipping will be required. I didn’t know of these archives, else I would’ve known exactly what to report:

Assertion failed: PreviousCDO !=
nullptr
[File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.6\Engine\Source\Editor\UnrealEd\Private\Kismet2\BlueprintEditorUtils.cpp]
[Line: 1062]

Basically as it looks, it’s a bug on Kismet 2. WHen I open blueprint editor, it crashes, or when I hit play. error is version 4.7 too:

Assertion failed: PreviousCDO !=
nullptr
[File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Editor\UnrealEd\Private\Kismet2\BlueprintEditorUtils.cpp]
[Line: 1100]

I don’t think rest of information on file is useful, as it’s only a bunch of addresses which don’t seem to really mean anything:

KERNELBASE.dll!UnknownFunction
(0x00007ffa397e5bf8) + 0 bytes
[UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction
(0x00007ffa1f602f7d) + 0 bytes
[UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction
(0x00007ffa1f4960f8) + 0 bytes
[UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction
(0x00007ffa1f479192) + 0 bytes
[UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction
(0x00007ffa185dcde3) + 0 bytes
[UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction
(0x00007ffa185d9664) + 0 bytes
[UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction
(0x00007ffa185d66b8) + 0 bytes
[UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction
(0x00007ffa185dcfe8) + 0 bytes
[UnknownFile:0]

Anyway, full error log is here UE4Bug - Pastebin.com I’ve checked some 5 files, and they all have exact same error.

4

Yea, that looks like a known crash involving Event Dispatchers. Can you verify that you’ve been using Event Dispatchers in your project?

5

I read about Event Dispatchers, do you mean Custom Events? I was using them to implement Network Functions.

6

Not quite, but it may involve Custom Events. It’s part of Blueprint Communications. Check out this page and see if any of it looks like what you were doing:

https://docs.unrealengine.com/latest/INT/Engine/Blueprints/UserGuide/BlueprintCommsUsage/BPComHowTo/index.html

If so, you may need to find places you used Event Dispatchers and remove them. You may be able to recreate them and get it working again.

7

Hi lucasassislar,

We haven’t heard back from you in a while, so I’m resolving this post. Please let me know if replacing any BPs that were using Event Dispatchers has not resolved your crash on Play, and I’ll reopen post. Thanks!