[ROS2] "no such command" for using "colcon build --merge-install" on Windows 10

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If this worked for you, can you accept your answer by clicking on the check mark to the left?

OK; In fact, I try using the command above, but after running the colcon build --merge-install, there is an error which shows:

Starting >>> turtlesim
--- stderr: turtlesim
Traceback (most recent call last):
File "c:\python37\lib\site-packages\colcon_core\executor__init__.py", line 91, in __call__ rc = await self.task(args, *kwargs)
File "c:\python37\lib\site-packages\colcon_core\task__init__.py", line 93, in __call__ return await task_method(args, *kwargs)
File "c:\python37\lib\site-packages\colcon_ros\task\ament_cmake\build.py", line 72, in build additional_hooks=additional_hooks)
File "c:\python37\lib\site-packages\colcon_cmake\task\cmake\build.py", line 86, in build rc = await self._reconfigure(args, env)
File "c:\python37\lib\site-packages\colcon_cmake\task\cmake\build.py", line 153, in _reconfigure 'VisualStudioVersion is not set, '

RuntimeError: VisualStudioVersion is not set, please run within a Visual Studio Command Prompt.
---
Failed <<< turtlesim [ Exited with code 1 ]
Summary: 0 packages finished [1.17s]
1 package failed: turtlesim
1 package had stderr output: turtlesim
VisualStudioVersion is not set, please run within a Visual Studio Command Prompt.

And do you know how to solve this issue?

The error message is pretty clear. From a quick Google search, I found this: https://answers.ros.org/question/3174... Not sure why the Windows installation tutorials don't mention this though.

actually, it does mention it here: https://index.ros.org/doc/ros2/Tutori...

Thanks for your guide. It seems ROS2 building requires a VS code environment. So, I cannot use my falimilar PyCharm as my ROS IDE, am I right?

Visual Studio, not Visual Studio Code. You can use anything if you execute the command to setup the VS environment (in the solution I linked to above) before executing any colcon command.

Thanks! The command colcon can run normally now.

But I still met an error as,
Starting >>> turtlesim
[Processing: turtlesim]
Failed <<< turtlesim [ Exited with code 1 ]
Summary: 0 packages finished [35.5s]
1 package failed: turtlesim

And could you please provide me with more guide and help?