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4.11.2 Leapmotion plugin crash after enabling passtrough

To reproduce this bug : -create empty project -enable official leapmotion plugin -change player pawn to leapmotion passtrough character -click play, then exit play mode and enter again. alternatively : -change player pawn to leap echo hands -press "h" to change type to image hands -enter play mode exit then enter again.

Product Version: UE 4.11
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asked Apr 28 '16 at 04:49 PM in Bug Reports

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TheBricktop
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avatar image Rudy Q ♦♦ STAFF Apr 29 '16 at 01:50 PM

Hello TheBricktop,

I was not able to reproduce this issue on our end. 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 in a clean project?

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

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

avatar image TheBricktop Apr 29 '16 at 09:39 PM

Thanks for reply! Seems like uninstalling and reinstalling leap motion orion fixed the issue for a while. But after exiting and entering editor again it crashed as before after enabling hand image/passtrough. Precise way to reproduce this bug: 1. create blank project in 4.11.2 2. enable Leapmotion plugin in input plugins. 3. create new gamemode 4. change pawn to leap echo hands 5. create input action ChangeHands, bind it to "h" (or whatever) 6. enter playmode 7. press "h" yesterday reinstalling leapmotion orion drivers (latest from developer website) temporarly fixed this issue but today its there again.

avatar image Rudy Q ♦♦ STAFF May 02 '16 at 05:08 PM

Thank you for the additional information, however I am still unable to reproduce this issue on our end. Would it be possible for you to provide the project that you are using to reproduce this issue? This way I will be able to take a closer look and further narrow down what issue it is that you are experiencing.

avatar image TheBricktop May 02 '16 at 05:14 PM

There is simple setup that initializes the crash:

link text

avatar image Rudy Q ♦♦ STAFF May 03 '16 at 02:20 PM

Hello TheBricktop,

After looking through your project, I didn't get the crash and it does not appear to have anything other than starter content and a new game mode. Is there anything special that I have to do within your project to get the crash to occur?

avatar image TheBricktop May 03 '16 at 02:27 PM

other than the steps I've specified before, not. Is it possible that the crash occurs because some C++ libriaries are not up to date or something? Its very weird.

Looking into saved folder for crash logs, is it telling You something about nature of the crashes? edit: updated everything on my computer, (win 7 sp 1, i5 3,2 ghz, 8 gb ram, gtx 660),uninstalled avast,reinstalled firmware and im still having this issue.

avatar image TheBricktop May 05 '16 at 02:53 PM

also after crash im having this log :

link text

crash_log.txt (2.8 kB)
avatar image Matt.Williams May 12 '16 at 03:07 PM

Hey TheBricktop,

I was able to find your crash in our system, but I haven't been able to reproduce it. However, I did notice a crash comment from another user that they think it might be related to Avast Antivirus interfering with the Leap Motion Plugin. Can I ask if you happen to use Avast?

-Matt W.

avatar image TheBricktop May 14 '16 at 02:31 PM

No ive completely uninstalled avast from my system, but then updated Nvidia drivers to the latest version. It helped a litle (meaning it does'nt explode every time i enable image hands) but I still cannot enable passtrough for the purpose of displaying leapmotion camera view in a material, it either crashes or doesnt show up at all.

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1 answer: sort voted first

Hey Bricktop,

We still can't repro it, but I've entered the crash as UE-31029 without an internal repro.

This is for the originally reported crash though. Does the new crash have the same callstack?

-Matt W.

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answered May 19 '16 at 04:15 PM

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