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drooer
Participant
May 8, 2023
Solved

Previously working .apk now crashes upon launch on Oculus Quest 2 without any changes made

Problem:
- Meta Quest Developer Hub (.apk built from Unreal Engine 5.0.3) crashes upon launching.
- App launch was working fine 6 hours before my Oculus was left switched on unattended (went to bed, woke up, did nothing to change anything and it didn't work anymore. was able to launch + cast prior).
- Used an old working .apk file to test and it crashes upon launching as well.

Have tried to troubleshoot but to no avail:
- factory reseting oculus + changing a new oculus set
- reinstalling several backed-up .apk files which used to work prior to sleeping
- repackaging .apk from my different backed-up unreal projects

Imported a sample VR template from UE5 and packaged it, .apk app launches successfully on Oculus. However, migrating my project file into the new template causes the new .apk to fail launch.
Rebuilding my entire game from VR template is too time consuming.

Any solutions/troubleshooting suggestions would be greatly appreciated. Please send help!

      This topic has been closed for replies.
      DPGamesAnswer
      New Participant
      May 16, 2023

      Hi guys,

      so, the issue was indeed caused by the hand tracking and I did manage to resolve the issue.

      In the end I moved everything up to 5.1.You then need to disable the Oculus plugin (which is now depricated and is the source of the problem).Download and install the new Meta XR plugin which you can find here...

      https://developer.oculus.com/downloads/package/unreal-engine-5-integration/

      And your project should now work and your hand tracking should be restored.

      Another benefit of this is that you can now use Hand Tracking V2 which wasnt supported under the old OculusVR plugin.

      Hope this helps someone!

      Dave

      View in thread

      10 replies

      chakrixr
      New Participant
      May 9, 2023

      This happened to me as well recently. I think there's a new Oculus update which is causing an issue. I managed to resolve the issue. In my case it's the "Handtracking Feature". Are you using "Oculus Hand Component" in your project? 

        drooerAuthor
        Participant
        May 9, 2023

        Hello chakri_xr , yes! I am using the handtracking feature. Could you please tell me what you did to resolve that issue

          chakrixr
          New Participant
          May 9, 2023

          Unfortunately, turning off Hand Tracking worked for me. There's a setting in project settings - plugins- OculusVR which allows to set OpenXR settings.....you have to revert it to Oculus Open XR and remove all blueprint nodes like "isHandTrackingEnabled", or what ever functions you are using on OculusHand (Also remove OculusHand Components from Pawn). This worked for me but fortunately my app doesn't need Hand Tracking. Please Do let me know if anything works for you apart from this

            drooerAuthor
            Participant
            May 9, 2023

            I think I could compromise on the handtracking feature for this project. thank you so much for this, will give it a go and let you know if it works!

              drooerAuthor
              Participant
              May 10, 2023

              hey chakri_xr , when you reverted the motion controllers back to default (quest controller), does your debug line show 2 for each hands? somehow I have 2 debug lines come out from each controller and am wondering if that's one of the bugs too, because it usually only shows one (from each hand).

                chakrixr
                New Participant
                May 10, 2023

                Hey drooer ! Glad that it worked for you! Are you referring to widget interaction debug lines? if so, it's a bug which is there for a long time and hasn't fixed yet. I had a work around....I usually set-up a Niagara Laser system with dynamic beam emitter and use them for pointers. Hope this should work for you too!

                  DPGames
                  New Participant
                  May 12, 2023

                  Hi guys, did anybody find a solution that does not invlove removing hand tracking? It's kind of the core element of my app!

                    drooerAuthor
                    Participant
                    May 16, 2023

                    Hey, I decided to remove the hand tracking feature from my project, unfortunately. Couldn't find a solution (was in a time crunch). Hope you have found a solution for your project.. if you do, please share it with us here 🙏

                      DPGamesAnswer
                      New Participant
                      May 16, 2023

                      Hi guys,

                      so, the issue was indeed caused by the hand tracking and I did manage to resolve the issue.

                      In the end I moved everything up to 5.1.You then need to disable the Oculus plugin (which is now depricated and is the source of the problem).Download and install the new Meta XR plugin which you can find here...

                      https://developer.oculus.com/downloads/package/unreal-engine-5-integration/

                      And your project should now work and your hand tracking should be restored.

                      Another benefit of this is that you can now use Hand Tracking V2 which wasnt supported under the old OculusVR plugin.

                      Hope this helps someone!

                      Dave

                        drooerAuthor
                        Participant
                        May 23, 2023

                        DPGames thank you so much!! 

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