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Vive Focus 3 OpenXR app terminates on startup


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Hello all, 

I'm encountering problems with running the Unreal VR template as stand alone app on my Vive Focus 3.
Whenever I try to open a packaged .apk on the device, the app terminates and brings me back to the library, without any further notification. 

I followed all instructions provided in the documentation. https://developer.vive.com/resources/openxr/openxr-mobile/documentation/
The issue occurs both for Unreal 5.0 and 5.1 with the OpenXR plugin enabled. 

I can still successfully build android apps in Unreal 5.0 using the WaveSDK plugin. 

Is this occurring to more people?

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  • 2 weeks later...

I still haven't been able to resolve the above issue. 

Initially I was able to successfully launch the APK on the device using Unreal 5.1. Then I made changes to the android configuration on my pc, a.o. running the SetupAndroid.bat for Unreal 5.0 and 5.2 preview. This included referring to version 8.0 for the   Command-Line Tools, as per item 3 of documentation https://docs.unrealengine.com/5.1/en-US/how-to-set-up-android-sdk-and-ndk-for-your-unreal-engine-development-environment/ . 

The issue now only occurs for Unreal 5.1, UE 5.0 works fine. The issue also occurs when using a different PC. A factory reset of the VR device didn't resolve. 

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It's working again. One of the following might have resolved it:

  • Refesh  libopenxr_loader.so (Documentation Ch. 3.2 step 1). I might have overrun it when I performed the Verify option on the Unreal installation.
  • Update Java to 1.8.0_351 (link in documentation Ch 4.1.3 refered to 1.8.0_202, if that matters)
Edited by artijn
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