# Issue with running cam calibration

Source: https://forum.modalai.com/topic/347/issue-with-running-cam-calibration
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2021-07-22 06:10:37 UTC by Thomas MacNamara
Replies: 3 · Views: 760

## Thomas MacNamara · 2021-07-22 06:10:37 UTC

I am having a few issues running the camera calibration on the VOXL
I am following the steps in https://docs.modalai.com/calibrate-cameras/

When I try to run any of the voxl_cam_ros features I get the following error
```
yocto:/$ roslaunch voxl_cam_ros tracking_slave.launch
[tracking_slave.launch] is neither a launch file in package [voxl_cam_ros] nor is [voxl_cam_ros] a launch file name
The traceback for the exception was written to the log file
```
Here is my current installed packages 
```
yocto:/$ opkg list-installed | grep "voxl"
libvoxl_cutils - 0.0.2
libvoxl_io - 0.5.4
voxl-camera-server - 0.7.1
voxl-cpu-monitor - 0.1.7
voxl-dfs-server - 0.2.0
voxl-docker-support - 1.1.3
voxl-gphoto2 - 0.0.5
voxl-imu-server - 0.8.1
voxl-mavlink - 0.0.2
voxl-modem - 0.12.0
voxl-mpa-tools - 0.2.6
voxl-nodes - 0.1.7
voxl-qvio-server - 0.3.1
voxl-streamer - 0.2.3
voxl-suite - 0.4.6
voxl-tag-detector - 0.0.2
voxl-tflite - 0.0.1
voxl-tflite-server - 0.1.1
voxl-utils - 0.7.1
voxl-vision-px4 - 0.9.2
voxl-vpn - 0.0.3

```
I assume I am missing something but I have read through the documentation a few times to try and work out what I have done wrong

## Reply by Guest · 2021-07-22 16:53:22 UTC

Hi Thomas,

This is an error in our documentation as we're halfway between calibration projects, sorry about that. We're currently close to having a non-ros based onboard camera calibrator published, but in the meantime you should run 
```
roslaunch voxl_mpa_to_ros voxl_mpa_to_ros.launch
```
Instead of the voxl cam rosnode. This will pull frames from voxl-camera-server (so make sure that's also running) and publish them over ros in the same way that voxl-cam ros would, so the rest of the calibration docs are current.

## Reply by Thomas MacNamara · 2021-07-23 02:08:51 UTC

Hi thanks for your help with that. 

Just a note: I love this thing, it is going to save me months of development time. What you all have done here is amazing.

But, please could you at least put some *We are messing with this code at the moment* or some *Deprecated* warnings in your documentation.

This is the third rabbit-hole I have gone down just to find out that the code does not exist or has been refactored. 

Part of the issue is I am trying not to be too much of a pain asking questions and i assume that often it is an issue on my side so by the time I have posted I am already a day into hitting my head against a wall.

## Reply by modaltb (ModalAI staff) · 2021-07-26 15:50:04 UTC

Hey @Thomas-MacNamara ,

I totally hear you...  We are reeeeal close to a big docs update......  Should be dropping on the server within days and hopefully we can clear things up.  Appreciate the patience and please keep providing feedback as you have issues!

-Travis