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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 headset)

  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

Workaround: 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.

Product Version: UE 4.14
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asked Dec 21 '16 at 10:13 PM in Bug Reports

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Tom Shannon
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Hello Tom Shannon,

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: https://issues.unrealengine.com/issue/UE-40012

Make it a great day

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answered Dec 22 '16 at 02:56 PM

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Rudy Q ♦♦ STAFF
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avatar image LeFxGuy Mar 07 '17 at 12:33 PM

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

avatar image Rudy Q ♦♦ STAFF Mar 07 '17 at 02:50 PM

Hello LeFxGuy,

The report has been updated.

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