[4.7.3 to 4.7.4] Project Crash on Startup

Development Programming & Scripting Multiplayer & Networking
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1

Hello,

I have a project that is in pure blueprints and I am experiencing a crash on startup when I try to load project from launcher. I can still open project as long as I’m using a previous version from 4.7.4

I have attached crash log

Attachment: Crash Log

UPDATE:
I have found offending blueprint that causes a crash and have attached it to post. If I remove this blueprint, project loads fine. If I put it in a blank project and touch it slightly within editor, it will crash. There’s also problem that this blueprint is also my player pawn, so any help a.s.a.p. would be appreciated. Thanks.

Attachment: BP_Player

2

Hi

Thanks for narrowing it down to this Blueprint! I’m taking a look now and can confirm crash in 4.7.4. Can you grab a screenshot of Blueprint’s graph in version it’s working in? Is that version 4.7.3, a source build?

After crash, did you submit call stack to Epic? We weren’t able to find it. Next time it crashes like this, please include a description and select Send. Thanks!

3

Additionally, please try disabling deferred dependency loading system (by overriding bDeferDependencyLoads in BaseEngine.ini to bDeferDependencyLoads=false). This will revert back to our old way of loading blueprints, and is more risky when it comes to cyclic dependencies, but it may unblock your project. Let me know what happens after trying that, as well. Thanks!

4

Hey ,

Thanks! Changing loading method allowed me to open my project.

Unfortunately for crash reports, I don’t think I’ll be able to send them as I’m working on machines that do require admin access.

offending blueprint will still cause a crash if I try to open its file in editor, or launch any levels that uses it.

I will try to find some time later today or over weekend to get screenshots of what’s in blueprint (it’s massive; it is player controller).

5

I don’t think admin privileges are required to access those logs.

Do you think you’d be able to upload project somewhere and get me a download link? developers would like to investigate cause of this crash, and that would be best way to do it. If project needs to remain private, you can send me link via PM on forums.

6

Ah, okay. I will try to send another one with crash.

I have also sent you a PM on forums with a link to project at bottom of log.

Thanks a bunch for help! Hope you guys can find a fix for it soon.

For now, I will probably be developing with 4.7.3 source until issue is resolved.

7

If it helps I noticed I cant even open MultiplayerShootout example that I had created in 4.7.3 project was untouched.

8

Hi

Thanks for test project! It definitely helped developers track down problem (UE-13274), and a fix is forthcoming. We’ve tested your project in fixed version, and crash no longer occurs. Let us know if you still have any problems once fix is released (should be sometime this week or next). Thanks again!

9

Great news! (also super close to my deadline on project, so this is a major relief)