Unmet Dependencies when installing python-catkin-pkg-modules Kinetic on 16.04

[superjax]

Hey there,

I've got a really weird problem trying to install ROS on a vanilla installation of Ubuntu 16.04. When I install ros-kinetic-desktop-full apt-get only downloads something like 13kB worth of packages, and it appears that a bunch of the python-ros* packages are missing. I've tried to install them all manually, but I am getting this output out of aptitude when trying to install python-catkin-pkg-modules.

 python-catkin-pkg-modules : Conflicts: catkin but 0.6.16-4 is installed.
 python-catkin-pkg : Conflicts: catkin but 0.6.16-4 is installed.

I am unable to simultaneously install python-catkin-pkg-modules, catkin, python-roslaunch and python-roslib. I'm not an apt wizard, but it seems to me that there is some version mismatching.

I have replicated this issue now on 6 computers, all with fresh 16.04 installations and different hardware. Any ideas?

[el3ment]

I am also having this issue.

[dirk-thomas]

It looks like that you are mixing upstream Debian packages of ROS (e.g. catkin, note that is doesn't have the prefix ros-kinetic-) with packages provided by the ROS repositories (python-catkin-pkg-modules since the package in the ROS repo has a newer version that the Ubuntu repo). This is not a supported setup - see http://wiki.ros.org/UpstreamPackages for details.

You can either uninstall catkin and install ros-kinetic-catkin instead (using the packages provided by the official ROS apt repo) or remove the ROS repo from your apt list and use only Debian packages provided directly with Ubuntu.

[el3ment]

How am I mixing them? I don't doubt that I am -- I just honestly don't know how it's happening. If I remove all the installed packages, and then delete the ros_latest.list file created by step 1.1 in the installation guide calling sudo apt-get install ros-kinetic-desktop-full reports

iris@ghost:/etc/apt/sources.list.d$ sudo apt install ros-kinetic-desktop-full
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package ros-kinetic-desktop-full

[dirk-thomas]

If you remove the ROS repository you can only install Debian packages available in Ubuntu. I am not sure but it looks like that there is no desktop-full package available. Also note that the upstream Debian packages are not prefixed with ros-kinetic- but mostly only with ros-. See https://wiki.debian.org/DebianScience/Robotics/ROS/Packages for a list of available packages.

[el3ment]

If I'd like to install using the packages.ros.org packages (I need the xacro package which hasn't made it into the Debian repository yet), how do I prevent apt from using the upstream packages when installing ros-kinetic-desktop-full?

[dirk-thomas]

If you use the ROS apt repo and install ros-kinetic-... packages no packages from upstream will be installed. If you have some upstream packages installed apt should complain about it and you need to remove those.

[el3ment]

After installing and trying to run roscore or roslaunch I find that neither were installed and that I am to install python-roslaunch which comes from us.archive.ubuntu.com/ubuntu not packages.ros.org. Attempting to install python-roslaunch gives an error that python-roslib has an issue with catkin. I confirmed that ros-kinetic-python-catkin is installed but sudo apt install python-roslib is looking for catkin not ros-kinetic-catkin. I feel like something somewhere is definitely going wrong.

[dirk-thomas]

Please follow the install instructions after uninstalling upstream Debian packages. python-roslaunch is an upstream Debian package. The equivalent in the ROS repo is called ros-kinetic-roslaunch (same for roslib).

[superjax]

Okay, that makes sense. I'm following the install instructions you have linked, but it seems that the real issue is that ros-kinetic-desktop-full isn't installing the proper packages, and I'm trying to install the upstream packages to fix it. Thanks for the information about the right names for the ROS repo. Any idea why ros-kinetic-desktop-full doesn't install roscore and catkin automatically?

[el3ment]

I suppose the issue is that ros-kinetic-roslaunch was installed (via sudo apt install ros-kinetic-ros*), but it's not finding the command (and that the "help" command to install "python-roslaunch" is misleading). I was neglecting to source the /opt/ros/kinetic/setup.bash file.

[superjax]

Aha! That makes sense. my automated scripts have the same issue.

Thanks!

[tfoote]

@jediofgever The apt sources are unrelated to this issue.

[rayxyz]

Hi, guys, I've solved the same problem by adding deb http://cz.archive.ubuntu.com/ubuntu xenial main universe to the file /etc/apt/sources.list, and run the command sudo apt-get update, then install the kinetic by run sudo apt-get install ros-kinetic-desktop-full , everything went smoothly. You guys can visit the link https://packages.ubuntu.com/xenial/al... for more detail. The problem is the lack of python-qt-binding in the system or something goes with the packages.

[tfoote]

@rayxyz That's also a different issue.

[aravindharinair]

Hey,
I'm new to ROS and I don't have much experience working with Linux but I wanted to learn ROS for a college project. Now, following Jan Bernlöhr's guide (here), I installed Ubuntu on the Windows Subsystem but when running roscore. it's asking me to install python ros-launch which, when I try to install shows:
The following packages have unmet dependencies:
python-roslaunch : Depends: python-roslib but it is not going to be installed
And it goes back until catkin.
Now, as per what @el3ment said, I found that ros-lunar-roslaunch is installed but I have no idea how to proceed from there. I'm tried what @rayxyz suggested but it's showing:
ros-lunar-desktop-full is already the newest version (1.3.1-0xenial-20171120-113826-0800).
0 upgraded, 0 newly installed, 0 to remove and 127 not upgraded.
Any help regarding this would be appreciated.
Thanks in advance !

[tfoote]

@aravindharinair

In general for help please ask on https://answers.ros.org following our Support Guidelines

At the moment it's down due to infrastructure maintenance on our provider. But you need to source /opt/ros/lunar/setup.bash before running anything to get the lunar versions of things instead of the upstream version.

[aravindharinair]

Ok. Will use that for any further queries. Thank you for letting me know.

I had forgotten to source it. My bad. Sorry for the inconvenience!
Thank you!

[pianoslum]

I'm sorry, but I have the same problem and couldn't figure out how to solve it.
I'm on Debian 9 and followed the guide http://wiki.ros.org/melodic/Installation/Debian . However, when I try to install ros-perception, I get the following error:
python-catkin-pkg : Kollidiert mit: catkin aber 0.7.4-4 soll installiert werden
python-catkin-pkg-modules : Kollidiert mit: catkin aber 0.7.4-4 soll installiert werden
(translation : collides with: catkin but 0.7.4-4 should be installed)

I don't know how I could have mixed upstream or ros-packages - can you give me a hint?
Thanks!

[tfoote]

@pianoslum
In general for help please ask on https://answers.ros.org following our Support Guidelines

The package ros-perception is from Debian directly and is not melodic. Melodic would be ros-melodic-perception Please review http://wiki.ros.org/UpstreamPackages

[roobooot]

sudo dpkg -r --force-all python-rospkg
Afterwards, sudo apt --fix-broken install If you wanna reinstall ros, run sudo apt-get remove ros-* to remove ros. Then, install ROS from https://wiki.ros.org/ROS/Installation

[AyanHBK123]

I am trying to install ROS kinetic on Debain Buster but I am getting this error;
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
python-rosdep-modules : Depends: python-catkin-pkg-modules (>= 0.4.0) but it is not installed
Depends: python-rosdistro-modules (>= 0.7.5) but it is not installed
python-rospkg-modules : Depends: python-catkin-pkg-modules but it is not installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

I tried to fix the issue
from here #14054 (comment)

but now i am getting this error:
Can you help how to solve this issue ??

[clalancette]

Please ask questions like this on https://answers.ros.org . That is the central, searchable place to help for ROS.