BP selection crash editor

Development Programming & Scripting Blueprint
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1

If I select 4 blue blocks holding mouse button then editor begins to consume all available RAM until it ends. I kill process through console then so I can’t take any crash report. I don’t know is this only local issue on my PC or not, but I repeat this 3 times and all 3 times receive same result. OS Windows 8.1 x64, Editor v.4.10.2. Can anyone reproduce such behavior? Thanks in advance

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2

Hello,

I have a few questions regarding your issue:

  • Can you please cause the crash again and provide your Machine ID from the Crash Reporter window, and ensure that you hit send on the Crash Report?
  • Could you please try this in the 4.11 Preview?
  • Could you provide the logs from your project’s Saved->Logs folder?

Thank you.

3

Hello, thank you for quick response

  • this time it seems there was enough memory and editor didn’t crash, but anyway got error in logs below and got memory leak. However after closing BP editor’s window allocated memory wasn’t released
  • As preview would be downloaded I will give it a shot
  • log attached, error begins at 147th line

Seems that error isn’t fatal on computers with large memory amount, though maybe than more memory you have then more memory leaks, I can’t check this out

4

How much memory is your computer using at its highest point when you’re seeing this increase occur?

If you do get the crash to occur again, please do provide your Machine ID and ensure that you send the report.

5

Usually editor consumes about 1GB memory, now I’m working with edtor and it uses 600MB. At peak it was 4+GB, totally I have 6GB onboard. If I get editor crashed, I’ll send report, but anyway I will check it with 4.11 version as download would be done.

6

Keep in mind that your computer is also below what we recommend to run the engine, so it is quite possible that you will experience performance issues. Have a look at our minimum recommended specs: Supported Graphics Drivers on Linux | Unreal Engine Documentation

In terms of the crash you are seeing, definitely send the report and provide your Machine ID if it happens again, and let me know what the results of your 4.11 test are.

7

I reproduced error with 4.11 engine. This time memory didn’t leak, that’s good, however editor hang up for about 2-3 minutes. While I watched for memory in process explorer I saw that editor spawned subprocess “crashreporterclient” which sent report on background and died. After that editor get alive. I attach piece of log with same error as previous time.
It seems like after unsuccessful ensure() statement engine tries to collect information about nodes in editor and at this point something breaks or overflows

8

Hello,

I have attempted to reproduce the freeze that you are seeing in the 4.11 Preview, but I wasn’t able to see the same results as you. I suspect that the freeze you are seeing is due to the fact that you are below the recommended specs as far as your RAM goes.

Have a great day

9

Hello,

Thanks, for checking the issue, but didn’t you see any errors in output log? Maybe something’s wrong with my environment at all

10

Thank you for your vigilance :slight_smile:

11

The error message you are seeing in the log is an ensure that was most likely put in to prevent a potential crash from occurring, which also may be why you have not been able to reproduce the crash in 4.11. As far as the freeze goes, this seems to stem from high memory usage when attempting to access the members of multiple structs at once, and as your computer has a low amount of RAM, it freezes up for a minute or two.