Unreal 4.7.2 Editor Crash after run leapmotion demo standalone

Development Platform & Builds
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1

Now even I restart computer and open editor, still crash:
MachineId:8E6FBB8349B5775DA61375B588F0550E

Access violation - code c0000005 (first/second chance not available)

OVRDisplay64 + 25145 bytes
OVRDisplayRT64 + 41621 bytes
OVRDisplayRT64 + 22780 bytes
UE4Editor_D3D11RHI!FD3D11Viewport::FD3D11Viewport() + 726 bytes [d:\udk\unrealengine\engine\source\runtime\windows\d3d11rhi\private\windows\windowsd3d11viewport.cpp:61]
UE4Editor_D3D11RHI!FD3D11DynamicRHI::RHICreateViewport() + 168 bytes [d:\udk\unrealengine\engine\source\runtime\windows\d3d11rhi\private\d3d11viewport.cpp:461]
UE4Editor_RHI!RHICreateViewport() + 140 bytes [d:\udk\unrealengine\engine\source\runtime\rhi\public\rhimethods.h:1463]
UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::CreateViewport() + 473 bytes [d:\udk\unrealengine\engine\source\runtime\slaterhirenderer\private\slaterhirenderer.cpp:266]
UE4Editor_SlateCore!SWindow::ShowWindow() + 215 bytes [d:\udk\unrealengine\engine\source\runtime\slatecore\private\widgets\swindow.cpp:1087]
UE4Editor_MainFrame!FMainFrameHandler::ShowMainFrameWindow() + 266 bytes [d:\udk\unrealengine\engine\source\editor\mainframe\private\frame\mainframehandler.h:205]
UE4Editor_MainFrame!FMainFrameModule::CreateDefaultMainFrame() + 4204 bytes [d:\udk\unrealengine\engine\source\editor\mainframe\private\mainframemodule.cpp:202]
UE4Editor_UnrealEd!EditorInit() + 3591 bytes [d:\udk\unrealengine\engine\source\editor\unrealed\private\unrealed.cpp:115]
UE4Editor!GuardedMain() + 925 bytes [d:\udk\unrealengine\engine\source\runtime\launch\private\launch.cpp:133]
UE4Editor!GuardedMainWrapper() + 26 bytes [d:\udk\unrealengine\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() + 249 bytes [d:\udk\unrealengine\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__tmainCRTStartup() + 329 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

2

Hello ,

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

Quick questions:

  1. Is this the Leap Motion demo that you are speaking of : Ultraleap for Developers
  2. If so, do you have the official leap motion plug in set up for your project?
  3. If so, did you make sure to open it up in a first person project?
  4. Can you reproduce this crash in a clean first person project?
  5. If so, could you provide a detailed list of step to reproduce this issue on our end?
3

Hello Rudy,
Thank for help, for 1, yes I use the demo from there,
2, yes I use official leap motion plugin
Finally found out the problem is caused by when connected Oculus rift in Direct HMD access mode for all project, and it should because of laptop issue with Optimus, and same issue already raised up by others in Answerhub( UE4 crashes on bootup when Oculus is plugged in - Programming & Scripting - Epic Developer Community Forums )
Using extended mode can solved the problem! Thank Again

Error message:
Access violation - code c0000005 (first/second chance not available)

OVRDisplay64 + 25145 bytes
OVRDisplayRT64 + 41621 bytes
OVRDisplayRT64 + 22780 bytes
UE4Editor_D3D11RHI!FD3D11Viewport::FD3D11Viewport() + 726 bytes [d:\udk\unrealengine\engine\source\runtime\windows\d3d11rhi\private\windows\windowsd3d11viewport.cpp:61]
…

4

Hello ,

I am happy to hear that your issue has been resolved. I am going to change your comment to an answer. If you have any further questions or information on this issue please go here:

This is the original thread for this issue.

Make it a great day.