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Content Browser crashes when child BP is changed

I have a few folders with multiple child BluePrints (around 10 in each folder), each BP has over 100 components (mostly static meshes). Before 4.11 I was able to edit these BluePrints, rename them, move them to different folders etc.

Since 4.11 I cannot rename, edit, save, compile or basically do anything with these child BluePrints anymore because the engine just closes even without crash reporter. In other folders it works perfectly, but inside these folders the engine crashes as soon as I try to change one of these BPs in any way. I have already tried to fix up redirectors on the folders, but it has no effect.

Product Version: UE 4.11
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asked Apr 08 '16 at 09:57 PM in Bug Reports

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Blue669
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avatar image Rudy Q ♦♦ STAFF Apr 12 '16 at 06:02 PM

Hello Blue669,

I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this issue this issue in a clean project?

  2. If so, could you provide a detailed set of steps to reproduce this issue on our end?

  3. Could you provide screen shots of any blueprints that may be involved?

avatar image Blue669 May 04 '16 at 09:52 AM

Sorry, I cannot reproduce this in a clean project.

Here is what I did: - Made a master BluePrint. -Created a child Blueprint of that and placed around 100-200 static meshes inside. (It seems that adding child actors to this child Blueprint may have a connection to the crashes) -Save the Blueprint and start duplicating it. -At around 5-10 of these blueprints in the same folder, try to rename or move them to a different folder. -The content browser crashes 100% of times on my end.

Here is the last log entry btw: [2016.05.04-08.30.09:159][247]LogCrashTracker:

[2016.05.04-08.30.09:255][247]LogCrashTracker:

[2016.05.04-08.30.09:255][247]LogWindows:Error: === Critical error: === Fatal error: [File:D:\BuildFarm\buildmachine_++UE4+Release-4.11\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 177] Illegal call to StaticFindObjectFast() while serializing object data or garbage collecting!

[2016.05.04-08.30.09:323][247]LogExit: Executing StaticShutdownAfterError [2016.05.04-08.30.09:526][247]LogPhysics:Warning: PHYSX: ....\PhysX\src\NpScene.cpp (2946) 8 : PxScene::unlockWrite() called without matching call to PxScene::lockWrite(), behaviour will be undefined. [2016.05.04-08.30.09:527][247]LogPhysics:Warning: PHYSX: ....\PhysX\src\NpScene.cpp (2946) 8 : PxScene::unlockWrite() called without matching call to PxScene::lockWrite(), behaviour will be undefined. [2016.05.04-08.30.09:527][247]LogPhysics:Warning: PHYSX: ....\PhysX\src\NpScene.cpp (2946) 8 : PxScene::unlockWrite() called without matching call to PxScene::lockWrite(), behaviour will be undefined. [2016.05.04-08.30.09:551][247]LogWindows: FPlatformMisc::RequestExit(1) [2016.05.04-08.30.09:551][247]Log file closed, 05/04/16 10:30:09

avatar image Rudy Q ♦♦ STAFF May 04 '16 at 02:23 PM

Hello Blue669,

Would it be possible for you to provide the project that is having the crash so that I can take a closer look?

avatar image Blue669 May 04 '16 at 02:32 PM

Unfortunately it's a very big project of a commercial game, so I'm afraid that's not so simple.

avatar image Rudy Q ♦♦ STAFF May 04 '16 at 08:03 PM

Would it be possible for you to migrate the asset to a new project and then provide the blank project containing the asset that causes the crash? Could you provide a complete call stack as well?

avatar image Rudy Q ♦♦ STAFF May 09 '16 at 08:51 PM

Hello Blue669,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will offer further assistance.

Thank you.

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Seems like I fixed it. The crash was caused because a child actor BluePrint I was using several times inside these BPs had its root set to "static" instead of "movable". When I tried to migrate the crash causing BP to an empty project, this error was shown plenty of times in the editor, so I changed this child actor BP root to movable and the crash is now gone.

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answered May 10 '16 at 07:37 AM

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Blue669
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avatar image Rudy Q ♦♦ STAFF May 10 '16 at 01:53 PM

I am happy to hear that your issue has been resolved. I will be converting you last comment to an answer. If this issue returns please feel free to reopen this issue with any additional information you may have. Thank you for your time and information.

Make it a great day

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