"Run Section" doesn't work as I would expect

I have the following function, with a couple of code sections defined. (I've also attached it.)

function [] = runSectionBug()

%% Code Section 1
disp('I am in Code Section 1')

disp('Put a breakpoint here (line 6). Run code to this line, then try to run Code Section 2')
%% Code Section 2

disp('I am in Code section 2. But do I also see a plot when I run this section?')

figure
plot(magic(4))
drawnow
%%

end

In prior versions of MATLAB, it was possible to do the following:

1. Place a breakpoint just ahead of Code Section 2
2. Run the code up to that breakpoint
3. Use "Run Section" (with the GUI button, or command-Enter on a Mac) to execute just that section

But in 2021b, that doesn't seem to work. (I don't know when this behavior changed.)

It feels like a bug to me that this does not work, because this seems like exactly the scenario that Code Sections are tailored to. But support does not seem to agree, and suggested a work-around of highlighting the code I want to run, and using the "Evaluate Selection" functionality instead.

I'm curious if other folks are using Code Sections, are/were they using them like I did, and I guess just thoughts in general.

[Adam Danz]

I also noticed this recently. The workaround I used is to manually select the section and then run selection (F9). But that can be a lot of work if the section is long.

Answer 1

[the cyclist]

After my initial interactions with Mathworks support, I later received confirmation that this is indeed a bug in R2021b. It will be fixed in a future release (I believe R2022a).

[tmozdzen]

In 2022b, I don't see the option to "run selection" anymore.

)-:

[Adam Danz]

It's easier to just press F9 to "run selection" (after highlighting a selection).

[Noah]

Using R2024a, and it still doesn't work. That's a bummer.

[the cyclist]

This bug I reported here was indeed fixed in R2022a, and I run sections very regularly.

I'm not sure what you are experiencing specifially, but you might want to open a new question or support request.