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I am referring to ROS2 Iron Beginner client libraries tutorial documents to learn it on Windows 10.

I gave the code colcon build --symlink-install --merge-install in cmd to build the workspace and received an error saying

0 packages finished, 12 packages aborted, 12 packages had stderr output

So I referred to the 'alternative' section in the installation documentation to build ROS2. Which uses the command:

vcs import --input https://raw.githubusercontent.com/ros2/ros2/iron/ros2.repos src

to get the repositories. Then I got the error saying

vcs is not recognized as an internal or external command, operable program or batch file

So I tried to install vcs using pip install vcs. Which gave me the below error:

C:\iron>pip install vcs
Collecting vcs
  Using cached vcs-0.4.0.tar.gz (482 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [19 lines of output]
      Traceback (most recent call last):
        File "c:\python38\lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 353, in <module>
          main()
        File "c:\python38\lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "c:\python38\lib\site-packages\pip\_vendor\pyproject_hooks\_in_process\_in_process.py", line 118, in get_requires_for_build_wheel
          return hook(config_settings)
        File "C:\Users\resea\AppData\Local\Temp\pip-build-env-qt6ojzuu\overlay\Lib\site-packages\setuptools\build_meta.py", line 325, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=['wheel'])
        File "C:\Users\resea\AppData\Local\Temp\pip-build-env-qt6ojzuu\overlay\Lib\site-packages\setuptools\build_meta.py", line 295, in _get_build_requires
          self.run_setup()
        File "C:\Users\resea\AppData\Local\Temp\pip-build-env-qt6ojzuu\overlay\Lib\site-packages\setuptools\build_meta.py", line 487, in run_setup
          super().run_setup(setup_script=setup_script)
        File "C:\Users\resea\AppData\Local\Temp\pip-build-env-qt6ojzuu\overlay\Lib\site-packages\setuptools\build_meta.py", line 311, in run_setup
          exec(code, locals())
        File "<string>", line 11
          except IOError, err:
                        ^
      SyntaxError: invalid syntax
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

I don't know how to proceed with this. I cannot build ROS2 by getting Github repositories as vcs is not getting installed.

Note: I have to use VS2022 even though installation documents say to use VS2019, as community no longer offers VS2019. Is it somehow contributing to the above error?

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1 Answer 1

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Could you try to run pip install vcstools instead like being mentioned here

https://answers.ros.org/question/386163/vcs-command-not-found/

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  • $\begingroup$ Hello Michael, Thank you for your reply. I tried this. vcstools installation is successful. However when I give the command to import from github (vcs import....) it still gives me the same error. However, I checked my C disk and now I see some files that have been created from my previous tries. That means it had done what it should do. But, still I get errors when I proceed with the tutorial. Clueless but trying to figure out the issue. $\endgroup$
    – Ann_u
    Commented May 9 at 16:45

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