App Designer not Saving New Codes

Hello Everyone,

My app designer is not saving new codes....It shows the * sign and when I save, it does not save the new code. I then have to shut down sometimes and the code still remains like the old code without the new code...Please advise me on what to do.

Cheers

[Walter Roberson]

Does that include when you ask to "Save as" ?

At the risk of sounding obvious: is your disk full?

[DARLINGTON ETAJE]

Thanks for your response Walter. This is a new laptop.

To find it, just type 15458969 on the search bar at www.bestbuy.ca

I really don't understand. So every other thing is fast. But when it comes to saving a new code, it does not work.

[DARLINGTON ETAJE]

It's now functioning perfectly. Thank You.

MATLAB is truly an excellent platform. I am grateful.

[Walter Roberson]

How did you solve the problem?

[DARLINGTON ETAJE]

I did nothing actually...it just started working again. Maybe because the laptop is so new...that might have been the problem. But now, it functions fine again. This laptop is really fast so I was surprised with that problem. Now, within 10 seconds, the new code is saved.

[DARLINGTON ETAJE]

Actually the problem has started again. This time it doesn't save at all. I dont know what to do. Saving on the main MATLAB script is instant but on the app designer, it does not happen at all. I can't even do anything any longer.

[DARLINGTON ETAJE]

So I noticed earlier versions like R2019b is great. The one with the issue is R2021. Maybe we should take a deeper look at it

[DARLINGTON ETAJE]

But I prefer the R2021 so how do we solve this problem...Walter, please is there someone I can talk to for help with this...

[Walter Roberson]

You will probably need to create a support case for this.

I myself almost never use App Designer at all, and I only use matlab on Windows to check compatibility, not to do development.... so I do not have the experience to make any suggestions.

Answer 1

[Shanmukha Voggu]

Hi DARLINGTON ETAJE,

We are investigating the sources for the cause of not saving new code and even some times the save may be delayed especially for large files

The reasons may be

- If the app is large then tab completion in large files can delay the save

- Parsing the contents of the file to fill in App Designer's Code Browser

The team is investigating other sources as it appears there are more causes for this than just the two above and may be fixed in future releases

I recommend splitting out some logic from the main MLAPP into external M-files to reduce the size of the app.

[DARLINGTON ETAJE]

Thanks Shanmukha for your response. The app file itself is not large even though there are over 4000 lines of code. The simulation when it runs is large hence I bought a new laptop. Now am having to code on my old laptop where I have R2019b and then when am done, I will transfer the file to my new laptop and run the simulation with R2021.

To asnwer Walter's comments...I still prefer to use MATLAB for mathematical apps. I wonder how people create all those mathematical tricks on other platforms from scratch. For serious difficult simulation, MATLAB is still the best.

[Thilina Gunawardhana]

Hi Shanmukha,

I can confirm this happening to me too. I wanted to edit an app whihc one of ex-colleagues had written using Matlab 2019b or earlier. I used 2021a because that's the latest version on my computer. App Designer was taking forever to save and wouldn't save even after 30 minutes.

However, I have installed the prerelease version of 2021b. Things have got a bit better. It saves, after taking a couple of minutes though, like 5 minutes.

Would like to see this improved in the full release of 2021b.

Thank you!

[DARLINGTON ETAJE]

Thanks Shanmukha...I look forward to using the 2021Rb App Designer on MATLAB.

[Walter Roberson]

@DARLINGTON ETAJE

R2021b is now released.

[DARLINGTON ETAJE]

Thanks for letting me know Walter...I will get it today God willing.

I appreciate you.

[Roberto Echeverria]

Hello all,

I'm using 2021b, my app designer started to behave like this just today without any previous sign...

When i clic on save / save as it does nothing.

I clic on RUN, it tries to save and gets stuck doing nothing.

I clic exit, and if try to save it gets stuck.

Any update on this?

regards

[DARLINGTON ETAJE]

Hello @Roberto Echeverria.

This problem has been solved for me especially when using R2021b. One method I used before it was solved was to save the app on a USB file and then run the app that way.

But contact Mathwork support and they will help you excellently.