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anok1023
New Participant
October 15, 2025
Question

Intermittent xrGetEyeGazesFB Initialization Failure in Unity (Quest Pro via Air Link)

I'm developing Meta Quest Pro on unity by connecting it pc via airlink
I occasionally get this error (roughly 1 out of every 5 runs):

[OVRPlugin] [XRCMD][failure] [XR_ERROR_INITIALIZATION_FAILED]: 
xrGetEyeGazesFB(m_xrEyeTracker, &eyeGazesInfo, &eyeGazes), 
arvr\projects\integrations\OVRPlugin\Src\Util\CompositorOpenXR.cpp:10663
(arvr\projects\integrations\OVRPlugin\Src\Util/CompositorOpenXR.h:364) 
UnityEngine.Debug:LogWarning (object) 
OVRManager:OVRPluginLogCallback (OVRPlugin/LogLevel,intptr,int)
(at./Library/PackageCache/com.meta.xr.sdk.core@78.0.0/Scripts/OVRManager.cs:2162)

using Meta XR All-in-One SDK v78 with Unity 2022.3.67f2.
XR Plugin Management is checked OpenXR
Project Setup Tool reports no issues.
In OVR Manager Eye Tracking Support and Permission Requests on Startup > Eye Tracking are checked.

I simply added the Eye Gaze Building Block and call OVRPlugin.GetEyeGazesState() to read data.
The system works most of the time, but sometimes initialization fails and logs the warning above.

Has anyone else seen this intermittent initialization failure, is there a recommended fix or workaround?

1 reply

4tothefloor
Meta Employee
October 16, 2025

Hey there anok1023!

I understand you're having issues with the Eye Gaze building block. Since you mentioned you're using Airlink, have you tried connecting with PCVR via cable link? That would be my first suggestion as a troubleshooting step, especially if it's a timing issue.

That said, you could also try adding a slight delay after startup before calling OVRPlugin.GetEyeGazesState(). That might be able to tell you if it's a subsystem initialization timing issue or not. Lastly, I would just make sure you're using the latest version of the OVRPlugin and  Unity OpenXR Plugin to avoid any version mismatch issues.

I can link some of our documentation below that should be helpful to you. Hopefully you found some of this helpful, and if not, please feel free to let me know and we can investigate further!

XR Plugin Management for Meta Quest

-G

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