@tom - that solved the problem . The solution was to download and build using voxl-cross:V2.7
Thanks for the very prompt response ! regards, Hector

@tom , can I install and use voxl-cross(2.7) concurrently with V4.0 ? Or do I have to delete my V4.0 installation ?

@Eric-Katzfey
Hi Eric - the exact sequence I'm following is:

$ git clone https://gitlab.com/voxl-public/voxl-sdk/services/voxl-vision-hub/
$ cd voxl-vision-hub
$ voxl-docker -i voxl-cross
voxl-cross(4.0)$ ./install_build_deps.sh qrb5165 dev
voxl-cross(4.0)$ ./build.sh qrb5165

I've tried both options qrb5165 and qrb5165-2 and both fail at build.

Thanks, Hector

Tom - thanks for the prompt response. I used qrb5165-2 since I'm running on Ubuntu 20.04 and the build instructions mention to use that option.
I re-did the procedure (after deleting all files from the previous attempt) , this time I used qrb5165 for both dependencies and built. Build fails, several warning, build error very similar as before:
[100%] Linking CXX executable voxl-vision-hub
/usr/lib/gcc-cross/aarch64-linux-gnu/10/../../../../aarch64-linux-gnu/bin/ld: CMakeFiles/voxl-vision-hub.dir/offboard_vfc.c.o:(.bss+0x48): multiple definition of `offboard_log'; CMakeFiles/voxl-vision-hub.dir/offboard_mode.c.o:(.bss+0x0): first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [src/CMakeFiles/voxl-vision-hub.dir/build.make:521: src/voxl-vision-hub] Error 1
make[1]: *** [CMakeFiles/Makefile2:155: src/CMakeFiles/voxl-vision-hub.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

I'm able to build other applications, so it seems my voxl-docker and voxl-cross are working properly. Please advise on what else could I try.
Thanks, Hector

Good morning,

There seems to be an overall problem with the tool chain to build VOXL Vision Hub.
First, I installed voxl-docker and voxl-cross(4.0) as described on the bootcamp.
I cloned voxl-vision-hub: git clone https://gitlab.com/voxl-public/voxl-sdk/services/voxl-vision-hub/
Then followed the instructions to build the target:
$ cd voxl-vision-hub
$ voxl-docker -i voxl-cross
Inside voxl-cross docker: install build dependencies:
voxl-cross(4.0)$ ./install_build_deps.sh qrb5165-2 dev
Then build:
voxl-cross(4.0)$ ./build.sh qrb5165-2

and then it fails to build ! After giving a long list of warnings, the error message is:
[100%] Linking CXX executable voxl-vision-hub
/usr/lib/gcc-cross/aarch64-linux-gnu/10/../../../../aarch64-linux-gnu/bin/ld: CMakeFiles/voxl-vision-hub.dir/offboard_vfc.c.o:(.bss+0x48): multiple definition of `offboard_log'; CMakeFiles/voxl-vision-hub.dir/offboard_mode.c.o:(.bss+0x0): first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [src/CMakeFiles/voxl-vision-hub.dir/build.make:521: src/voxl-vision-hub] Error 1
make[1]: *** [CMakeFiles/Makefile2:155: src/CMakeFiles/voxl-vision-hub.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

This is a major modalai package and it fails to build just following the instructions.
Please advise on how to proceed - This is somewhat urgent since the entire project is on hold if the tools for building don't work.
Thanks.

@Hector-Gutierrez Clarification on the pictures. The top picture is the centered position of the TOF ribbon cable. The bottom picture can be disregarded. The connection is done on the centered position (top picture). Thanks.

@Alex-Kushleyev
Hi Alex - attached are the pictures.

After installing the TOF connector in the centered location and fully attach all the screws (including the one that secures the TOF ribbon cable), there is no short and the drone starts normally. I get 4 cameras on VOXL portal, but no TOF. Also voxl-camera-server -l only see 4 cameras. So TOF connection seems definitely Ok, but sensor not present. Seems to me like a bad TOF sensor - let me know your thoughts.

@Hector-Gutierrez
Update from my previous post. I install the TOF connector in the centered location and fully attach the screws (including the one that secures the TOF ribbon cable). There is no short, the drone start normally, and I get 4 cameras on VOXL portal, but no TOF. Also voxl-camera-server -l only see 4 cameras. So TOF connection is definitely Ok, but sensor not present.

@Hector-Gutierrez
Download link for the pictures in case they did not attach to previous message:
https://quickconnect.to/asapstorage/d/s/13iMi9oRZUxhkQYoW2DCHtZ7nI9HgYJx/bj3PLF8EXd5pKdKgwphVqcbD7VaaMBQX-V7WAgk58WAw

@Alex-Kushleyev
Hi Alex - attached are some pictures of the connection. Something odd is happening. The connector engages its socket in two different locations relative to the hole for the screw. In the centered location (where it should be!) the TOF sensor causes a power short and the drone wont boot (see picture with red LED). In the off-center location there is no short and the drone boots, but I only get 4 cameras and the TOF is not visible.