Sean Yen

@xuliujian Thanks for sharing your data. Do you mind sharing more about your environment? (Such as, what's the ROS distro, Python version, etc?)

Hope this could be addressed by this: https://github.com/ros/ros_comm/pull/2051

Hope this could be addressed by this: https://github.com/ros/ros_comm/pull/2051

Vcpkg `2020.11` and above doesn't have this problem. Most likely we need to upgrade Vcpkg to fix this issue...

@GhengisGohan Looking into the [`Chocolatey.log`](https://answers.ros.org/question/352872/failure-install-ros-melodic-desktop_full-ros-catkin-tools-error-while-running-choclateyinstallps1/), the last debug log from `ros-catkin-tools` is `Install released ROS catkin tools...`. And the next line of it in the install script is: ``` pip...

@GhengisGohan Based on the `ros-catkin-tools` failure messages, I think you can find a Python installed under `c:\opt\python27amd64`. If it exists, can you try to run the following in a clean...

@GhengisGohan That's some interesting information. Can you do `python -m site` on the same command prompt? Also, I noticed there is a `USER_BASE` pointing to `C:\\Users\\xxx\\AppData\\Roaming\\Python`. What if you temporarily...

@GhengisGohan Sorry I was not clear about the instructions. Can you run the following in a clean command prompt: ```Batchfile set "PATH=c:\opt\python27amd64;c:\opt\python27amd64\Scripts;%PATH%" set "PYTHONHOME=c:\opt\python27amd64" python -s -m pip install -U...

@GhengisGohan Sorry for the typo there. Can you remove `-r` from the command? Like running `python -s -m pip install -U rosdep rosinstall_generator wstool rosinstall --disable-pip-version-check --no-cache-dir`.

@GhengisGohan since it looked like that your USER_BASE might have something to interfere with the installation, can you try to remove the `c:\opt` and do the following in an opened...