# Camera Calibrator overlay ERROR

Source: https://forum.modalai.com/topic/1924/camera-calibrator-overlay-error
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Tags: voxl2, calibrate, camera, streaming
Posted: 2023-03-08 16:13:39 UTC by KevinChan
Replies: 2 · Views: 1683

## KevinChan · 2023-03-08 16:13:39 UTC

I have just succeeded in calibrating the tracking camera.
But when I tried to calibrate the stereo camera, nothing showed up in VOXL portal
I have tried restarting VOXL2 but nothing works
![33496341-8792-4976-87d6-7f33e33e7d3a-image.png](https://forum.modalai.com/assets/uploads/files/1678291918316-33496341-8792-4976-87d6-7f33e33e7d3a-image.png)

## Reply by KevinChan · 2023-03-10 02:41:38 UTC

Found the problem 
it's supposed to be:
voxl-calibrate-camera stereo_front
or
voxl-calibrate-camera stereo_rear
instead of what the documentation said:
voxl-calibrate-camera stereo
Everytime I followed the guide, it will brick voxl2 and I have to reset it all over again
Poor guide!!!!!!!!!!!

## Reply by Chad Sweet (ModalAI staff) · 2023-03-10 03:13:43 UTC

Thanks for the feedback! Document updated here: https://docs.modalai.com/calibrate-cameras/#stereo-calibration-video-tutorial