Unable to view tf trees in ros2

[karthiaru]

Hi,

I’m in the Navigation Rosject project (ros2). I’m unable to view the tf trees using rqt_tf_tree as the package is not found. I tried installing and sourcing the ros (humble) environment. But no luck.

user:~/ros2_ws$ ros2 run rqt_tf_tree rqt_tf_tree Package 'rqt_tf_tree' not found

[CCAnabeza]

Hi @karthiaru,

Can you please send a screenshot of your current directory? As of late, you can try to rebuild the package and see if it is inside your ‘install’ folder.

Regards,
Christian

[girishkumar.kannan]

Hi @karthiaru ,

I think the rosject environment is lacking the installation of rqt_tf_tree package.

Your error clearly explains that when the output says: Package 'xyz' not found.

Run the following commands to install the package:

cd ~
sudo apt update
sudo apt install ros-<distro>-rqt-tf-tree   # distro=humble [in your case]

ros-<distro>-rqt-tf-tree depends on ros-<distro>-rqt-gui package to also be installed.
In case rqt_tf_tree does not start, then you may have to install rqt_gui package also.
In that case, also install rqt_gui package:

cd ~
sudo apt update
sudo apt install ros-<distro>-rqt-gui 
sudo apt install ros-<distro>-rqt-gui-cpp ros-<distro>-rqt-gui-py

This should fix your problem.

Regards,
Girish

[karthiaru]

Hi @CCAnabeza

Please find the screenshot.
As an alternate option, I was able to view the tf tree in a pdf using ros2 run tf2_tools view_frames.

[karthiaru]

Thanks Girish. Installing the rqt-tf-tree package worked. I tried this earlier, but didn’t run sudo apt update, so it didn’t get installed.

[girishkumar.kannan]

Hi @karthiaru ,

Yes, you always need to run sudo apt update before installing or removing any on any Linux based distros that use apt as package manager.

If I am right, this is also applicable for other Linux distros that use non-apt package managers such as pacman, dnf, etc. It is just to retrieve an updated list of currently installed and functional packages on the Linux distro.

Regards,
Girish