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4.11 quits without error or log


I'm having difficulties to test my project (Marketplace link) in 4.11 Preview 3. My problem is, that when i press play in my project and drive the car some meters, the direction doesn't matters, it will always just quit and leaving me without any error or log report, so i can't see what was the cause of this behavior.

Here is the video: Video.

Product Version: UE 4.11 Preview
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asked Jan 26 '16 at 04:59 PM in Bug Reports

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avatar image Adam Davis STAFF Jan 26 '16 at 09:49 PM

Hi Balint3DDesign,

  • Does this occur in a clean, blank project with no additional content or is it limited to one project in particular.

  • Can you post the crash logs here? They can be found at \Unreal Projects\PROJECTNAME\saved\logs.

  • What steps can I take to reproduce this error on my end?

  • Do you have any circular dependencies in your project? Is there any location where you are performing an action that could be problematic, such as dividing by zero or creating an infinite loop?

avatar image Balint3DDesign Jan 27 '16 at 04:52 PM


  • It only occurs in this project.

  • Here you can download the Crash Logs: mega.nz

  • Because this occurs only in this project for me, i can send you my project files to you through the Forums by PM if it's okay for you. (If yes, which version should i link? 4.10 or the converted 4.11)

  • My project didn't have any circular dependencies, in older versions of the engine from 4.8 - 4.10 it works fine.

avatar image Adam Davis STAFF Jan 27 '16 at 06:05 PM

Were there any updates you made just before this crash started occurring? In your logs I am seeing a reference to a ParticleTrail2EmitterInstance.cpp. Do you have a particle trail attached in the level that could be firing? If so try removing this particle system and see if the crash occurs again.

avatar image Balint3DDesign Jan 27 '16 at 06:42 PM

No i haven't made any update to my project before the crash started occuring. I have 4 trail particle emitter attached to my car and this are the cars skidmarks, if i don't let those fire the crash goes away. Also something isn't right with the cameras, because now i can see some serious shake/jumps on all of the 3 cameras.

avatar image Adam Davis STAFF Jan 27 '16 at 06:55 PM

How are you calling the particle systems? Most likely the camera issue is not directly connected to the crashes.

avatar image Balint3DDesign Jan 27 '16 at 07:02 PM

I'm just enabling/disabling it's visibility, based on some factors, like speed, brake, steering. Also i have wrote a PM with my project file, so you can take a look into that too.

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1 answer: sort voted first

I was able to reproduce this on my end and have entered a bug report, UE-26105, to be assessed by the development staff. It seems that even simply opening the Tireskid particle system will crash the editor, though this produces a callstack. I would remove this asset from your game for now so you can continue moving forward. All other particle systems in the same folder seem to be working as intended.

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answered Jan 27 '16 at 07:56 PM

avatar image Balint3DDesign Feb 02 '16 at 07:36 PM

I was able to solve this by recreating the particle system and it worked as it was before just needed to lower the particle count, though i discovered that if i use around 200 particle count on the ribbon data it will immediately crash the engine.

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