CPython error when running compiled application containing python module

Hi! I built a small Matlab standalone application (because I want to share it with others who don't have Matlab in their laptops), and inside the application I call a custom python module (a .py file which I packed along when I compiled the application).

Issue

When I test the compiled .exe file in my laptop, it works. However, it shows the following error when I try to run it in another laptop:

"Python commands require a supported version of CPython"

In the second laptop, python 3.9 is already installed (not from Microsoft Store but python.org page) and can be used in system prompt; the needed python distribution as well. Therefore, we wonder what can be the reason of that error message and what we should do?

Any help/advice will be greatly appreciated!

More information

My laptop:

• MATLAB r2021a; python 3.8; windows 10.
• The .exe file from folder "for redistribution" is sent to the other laptop.

The second laptop:

• It has MATLAB r2018 (though I believe to run the .exe will not need a MATLAB installation?); python 3.9; windows 10.
• Runtime is installed when we tried to run the .exe for the first time.

Answer 1

[Xinzhi Jiang]

Problem solved: python 3.9 is not supported until Matlab R2021b. Installing python 3.8 in the second laptop solved the issue.

Though the answer turns out to be pretty basic (and stupid), I will keep this post in case someone has similar queries in future.