Toggling VR Mode 2nd Time Crash with Rift CV1 (Workaround available)

Using a Rift CV1 (no touch), UE4.14 Windows 10 pro x64

Toggling VR mode (using stereo on and stereo off) a second time will crash UE4 IF the Oculus application was launched before the UE4 project AND IF the Rift Proximity Sensor is NOT activated (Being worn)


  1. Start with a blank project and
    create a new, default map (with the
    player start and sky, etc.)
  2. Save the map and assign it as the
    default map in the project settings
  3. close the editor
  4. Launch Oculus application
  5. Launch UE4 project as Game (right
    clicking on .uproject for example)
  6. Once loadeded use the console to
    issue the following commands:
    hmd enable then
    stereo on
  7. The headset shoud become active and
    you can put it on and see the scene
    in VR (You may have to agree to the
    health stuff, be sure to put on the
  8. Type stereo off into the console
    returning you to regular view
  9. Remove the headset (deactivating the
    proximity sensor)
  10. Type stereo on again into the
    console and
  11. Crash UE4

To avoid this crash you simply must ensure the Oculus application is not running before loading your application. It will load when your project loads, but you should be able to switch without crashing.

Hello ,

I was able to reproduce this issue on our end. I have written up a report and I have submitted it to the developers for further consideration. I have also provided a link to the public tracker. Please feel free to use the like provided for future updates. Thank you for your time and information.

Link: Unreal Engine Issues and Bug Tracker (UE-40012)

Make it a great day

The ticket says this is a duplicate but there is no link to the duplicate ticket? Is this bug already solved in master?

Hello LeFxGuy,

The report has been updated.