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4.15.2 crash on Paint tab in Landscape mode

Hi, I'm starting to learn how to use the engine, so I was following the Landscape mode built-in tutorial when the editor crashed.

I started a new empty C++ project with base code and created a new empty level. Then I clicked on the Landscape mode and started the tutorial. Everything worked fine until I switched to the Paint tab and I was supposed to add the Engine Content's Landscape_Material to my landscape. When I tried to add the material to the landscape, the editor crashed.

So I re-launched the editor and tried to do it in another way. I re-opened the empty level I created before and switched to the Landscape mode, then created a new landscape with the default settings in the manage tab and dragged the Landscape_Material to it. It went fine, so I thought the issue was gone, but then I clicked onto the Paint tab and the editor crashed again. I tried both ways a couple times more, but every time I had the same results.

I guess it may be due to my not-so-recent hardware (I'm using an Asus Zenbook with i5-3317U CPU, 6GB RAM and nVidia GT620M with 1GB dedicated GRAM) but I though it could be helpful to report the issue.

I hope this can be fixed, I really want to learn how to use this engine.

Product Version: UE 4.15
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asked May 05 '17 at 03:09 PM in Bug Reports

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ximera91
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Hey eko91,

So I investigated your crash internally and it looks like you are experiencing one of our top crashes. With the 4.15.2 release we actually rolled out a tool to help us identify and gather insight on the cause of this specific crash. I tested your exact process on my end and did not get the crash to occur unfortunately.

UE-42280

https://www.unrealengine.com/blog/tracking-down-gpu-hangs-with-nvidia-aftermath-and-4-15-2

If you’re currently working with a version of 4.15, we’d really appreciate it if you upgraded to 4.15.2 and update your NVIDIA drivers to 381.89 so we can act fast on getting these bugs squashed.

If you can consistently reproduce the crash on our end, please keep sending us the reports so we can continue to gather necessary information to implement a fix.

Thank you,

Andrew Hurley

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answered May 05 '17 at 06:27 PM

avatar image ximera91 May 05 '17 at 07:20 PM

Thank you for your response! I'm already running the 4.15.2, but I now noticed I have installed the 382.05 version of NVIDIA drivers, so I guess this might also be the cause of the issue.

Anyway, I'll keep sending crash reports as you asked and wait for the fix. Thank you!

avatar image AndrewHurley May 08 '17 at 09:05 PM

Yeah, I would also try the drivers I mentioned to see if that is more stable?

avatar image ximera91 May 08 '17 at 09:29 PM

I tried the 381.89 and nothing changed, maybe it got even worse actually. Drivers or not, I've been experiencing other crashes. The more annoying is one that happens in the pawn blueprint editor: whenever I try to change the skeletal mesh, the editor crashes (I've used mainly the SK_Mannequin of the free Animation pack). I guess the underlying problem is the same as the Landscape crash, so I kept sending crash reports. I saw in other posts that these can help, so I saved my DxDiag, the normal crash log and the log made with d3ddebug enabled. link text link text link text

I hope this gets fixed soon, I'm looking forward to work with this engine.

dxdiag.txt (93.2 kB)
crashlog.log (22.5 kB)
avatar image AndrewHurley May 09 '17 at 07:09 PM

Have you also attempted any of the workaround mentioned in the bug report on the issues tracker?

Thank you for the extra bit of information. We are waiting to see how this can get fixed, but it has been affecting a large number of users and getting the repro from anyone has proven to be difficult. I noticed you were working with a mobile gpu so that could be a point of interest.

avatar image ximera91 May 09 '17 at 09:06 PM

Incidentally, today it happened I had to fresh install Windows on my laptop, so I was also hoping on some miracle that would wipe the bug somehow, but of course it didn't have any noticeable effects on the engine. Except one small thing: this laptop has a small integrated SSD, so I installed the engine there thinking the improved reading speed would mitigate the bug; I was skeptical, but actually, for the first time, Unreal (after changing the character's skeletal mesh) was able to start compiling shaders, but it crashed as soon as the process finished. So I decided to apply the "real-time thumbnails" workaround and it actually worked smoothly, the crash in the character blueprint seems to be gone. The Landscape crash occurred anyways, so I also tried to set the TrdDelay value in the registry (setting it to 10), but it didn't solve the issue.

avatar image AndrewHurley May 10 '17 at 05:24 PM

We will just have to keep investigating and using the reports sent in by our users to identify the issue.

We actually just got another report for a very similar crash instance I will be investigating, so if any new information there is relevant to this one I will share it with you.

Cheers,

Andrew H.

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