Hi, when using UE5 with Meta Quest 2, launching VR preview will crash the engine the second time I try to launch (first time works fine, as expected).
Steps to reproduce:
Connect Meta Quest 2 to the PC, open Oculus Link in the headset, launching the Oculus App on the PC
Open Unreal Engine
Launch the game in VR Preview-mode
Close the VR Preview-mode
Launch the game in VR Preview-mode again
Searching through the logs, this seems to be the reason:
[2023.11.08-12.00.19:855][356]LogOutputDevice: Error: Ensure condition failed: ((Result) >= 0) [File:D:\build++UE5\Sync\Engine\Plugins\Runtime\OpenXR\Source\OpenXRHMD\Private\OpenXRHMD.cpp] [Line: 1045]
My Meta Quest 2 is connected and is running the Oculus App, using Oculus Link to enable the VR Preview in Unreal prior to launching both of the times.
I believe this is an issue with OpenXR, it happens on two different VR-projects, both in UE 5.0.3 and 5.1.1.
I also think that this issue is connected to both of these earlier posts:First Post Second Post
2 Likes
Gireada
November 8, 2023, 4:00pm
2
Same symptoms here, Array Index out of Bounds too…
LoginId:6add565b4e83249bb4d6ed85210d9753
Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 763] Array index out of bounds: 0 from an array of size 0
UnrealEditor_OpenXRHMD
AtsK
November 8, 2023, 11:57pm
3
Seems to be a bug related to some Oculus update. Setting SteamVR as the default OpenXR runtime and launching it before the editor is a workaround.
skeudo
November 9, 2023, 7:17am
4
This issue was introduced by the last Oculus app update, I don’t think Unreal team can do anything about that. You can create a ticket here: https://communityforums.atmeta.com/t5/Unreal-VR-Development/bd-p/dev-unreal
There are already 2 tickets about it, but the more, the faster they’ll consider this issue important.
Correct
UE427plus crash when going twice in VR, function xrCreateSession Fail in OpenXRHMD.cpp (so calling OpenXR core dll surely).
Oculus app is 59.00.138.366
Tested same code with VIVE headset, OpenXR and SteamVR (2.0.10) and no crash.
Oculus OpenXR runtime seem to be the problem.
KhenaB
November 10, 2023, 4:52am
6
Yep got the same issue since last update, glad to see it’s not just on my end
Same issue here. Super bad timing, last week before major milestone. Shape up meta…
Gireada
November 10, 2023, 1:20pm
8
I found a solution by installing MetaXR Plugin https://developer.oculus.com/downloads/package/unreal-engine-5-integration/51.0
Work with v51.0 for UE 5.1.1, when you choose other one it will write in requirements what UE version need to have.
Related here [5.1 Hand Samples - Array Index error? · Issue #247 · Oculus-VR/UnrealEngine (github.com )] (https://github.com/Oculus-VR/UnrealEngine/issues/247 )
Thanks for the suggestion, added a copy-paste of this post in that linked forum.
This worked, thank you for this suggestion!
1 Like
VictorLerp
November 13, 2023, 4:18pm
11
Thanks everyone for providing us with all of these details. Just wanted to let you know that I’ve reported the issue to Meta.
3 Likes
Hello guys, has the issue been solved with meta yet?
system
January 6, 2024, 4:27pm
13
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