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ARK Troubleshooting & Known Issues


This page provides troubleshooting information for issues you may encounter while using the Aria Research Kit (ARK).

It covers:

Go to the Glasses Manual for information about LED States, button configuration, how to factory reset and power cycle your device.

If you need further support, have feedback or feature requests, you can:

Device and Recording Issues

I haven't received my Project Aria glasses

Once your Aria glasses request has been approved, please contact if you project hasn't received the requested devices in:

  • 7 days when shipping to continental USA
  • 14 days when shipping internationally

I can't pair/detect my glasses with the Mobile Companion App!

Make sure your Aria glasses are plugged into power and that the privacy switch is not turned on (the switch should be pushed forwards (towards the lenses of your device) to be able to pair.

I can't start recording

Check that the privacy switch is not engaged. The switch should be pushed forward (towards the lenses of your device) for recording to be possible.

Aria Privacy Switch

Where's my recording?

It is possible you may have accidentally discarded your recording. Do not use the privacy switch to stop recording, as it prevents recording and deletes any current recording.

Stop recording does not work/ has a long delay

The longer a device records for, the longer it takes for a recording to stop. This is because the larger the VRS file, the longer it takes a recording to finish indexing. This can be particularly apparent in the Desktop App, as you can press the Stop button and it looks like nothing has happened.


Recording has not fully stopped until the Recording LEDs have turned off

Desktop App Issues

Aria device flickers on and off in the Desktop app

You most likely need to update your Aria device's OS. Pair your device with the mobile companion app. Your device should update automatically once paired. If the issue continues to occur:

  1. In the Aria Mobile Companion App, select the settings icon next to your Paired Glasses
  2. Scroll down to Device Mode
  3. If you have the correct device, the device mode should say “Partner”
    • If your device mode says anything else, please contact Aria User Support to get a replacement device
  4. If the device mode correctly shows “Partner”, scroll up to Glasses OS and select Check for Updates

Copying files locally takes a long time!

We recommend copying data from your Aria device using ADB or MTP (Windows automatic files transfer) rather than the Desktop App, for a faster experience.

On a Windows machine, your Aria device will be automatically detected as a USB drive when plugged in and the Windows File Explorer will automatically open a new window showing Aria and its internal device storage.

Go to the Quickstart Guide for ADB commands and MTP instructions.

Desktop app/computer can't detect my Aria device

It may be that your Aria device's battery is drained, make sure it is correctly charging (there should be a blue LED on the right arm) and wait ten minutes.

On Linux, this also may be due to USB driver issues.

Machine Perception Services (MPS)

How do I find out what recording profile was used?

There are several ways to check what recording profile was used.

Method 1: Check the vrs.json file

Every VRS recording comes with a .vrs.json file that contains metadata about that recording. Open the file with any text editor and check the recording_profile value.

Method 2: Get metadata from the VRS file

  1. Go to Recordings in the Desktop App
  2. Select Tools
  3. Select More > VRS Data Layout > JSON Metadata
  4. Select a VRS recording from your directory
  5. Search the opened .vrs-description.txt file for “profile”

Can’t upload data to MPS/Upload keeps failing

If you cannot upload your data to MPS it could be that your VRS file is timing out during upload. Finding a faster internet connection may help or you can reduce your VRS file’s size.

Machine Perception Services (MPS) Error Messages

Unsupported Format

You may encounter this error message when trying to unzip a downloaded MPS output file, especially large trajectory files. “Unsupported Format” occurs when the zip file has not fully downloaded. Please wait and try again later.

Unsupported MPS Profile

This recording profile does not support trajectory generation.
This recording profile does not support eye gaze generation.

Trajectory and Eye Gaze derived data can only be generated if they have the necessary sensor data. Go to the Recording Profiles page for information about supported profiles.

Recording duration not supported

This recording duration is not supported by trajectory generation.

If you experience this error message, it is because the recording is either too long or too short. Recordings need to be longer than 5 seconds and shorter than one hour.

Health checks failed (trajectory)

The health checks for this recording failed.

When trajectory data is derived, it goes through a series of health checks that are recorded in the summary.json file that's included with in every trajectory output. If your trajectory data fails, you can download a zip file that contains the summary.json file with further information.

Go to Recordings > Uploads to download the summary.json file.

If you need to reach out to Support, please include the Transaction ID (found in the Tools tab, MPS Uploads) as well as the summary.json file.