Mac Studio (Ventura 13.1) computer: keyboard failure in Matlab R2022b Editor and Command windows

A few days ago I installed Matlab 2022b on a Mac Studio computer configured as follows:

Chips: Apple M1 Ultra 20 cores;

Memory: 128GB;

HD: 4TB

The installation did not encounter any difficulties.

Entered the Editor environment, I found the spacebar has no effect on the script. Furthermore, trying to open the drop-down menu relating to the "New" item, the command window is invaded by errors, probably coming from Java, of the following type:

java.lang.NullPointerException

Then, I downloaded and installed the latest Java versions and restarted the system, but to no avail.

I am grateful to anyone who can help me solve this problem.

Thank you

Answer 1

[Aashita Dutta]

Hello Alessandro,

I understand that you are facing issues with Keyboard interaction in MATLAB R2022b in MacOS and getting errors related to java- NullPointerException.

Please refer to the following links that can help resolve the issue:

1. https://www.mathworks.com/matlabcentral/answers/515780-why-do-i-get-java-exceptions-java-lang-nullpointerexception-when-i-use-matlab-with-window-magnet-or

OR

2. Make sure Java is correctly configured- https://www.mathworks.com/help/compiler_sdk/java/configure-your-java-environment.html#bultjp6-2

OR

3. Try regenerating the preferences through- https://www.mathworks.com/matlabcentral/answers/99625-how-do-i-regenerate-my-matlab-preferences

OR

4. Try reinstalling MATLAB following the steps given in- https://www.mathworks.com/matlabcentral/answers/131519-how-do-i-perform-a-clean-installation-of-matlab

If you still experience issues, please contact MathWorks Support: http://www.mathworks.com/support/contact_us/

Hope this helps!

[Alessandro Passeri]

Hello Aashita,

I followed plenty of suggestions proposed in your message. Indeed, now the correlation between keyboard input and typed character both in the command window and in the MATLAB editor looks correct.

Unfortunately, the torrent of errors of Java origin remains unchanged when you open the drop-down menu relating to the "New", "Open" and "Save" functions. Nonetheless, it appears that these bug reports do not affect the ability to perform any of the functions contained therein.

Unfortunately, the execution of Matlab is interrupted, requiring a forced exit with loss of all the data contained in the WorkSpace, trying to execute the command

answer = questdlg('ok?','Control Window','Yes','No','Yes')

In case the answer is 'Yes', the variable "answer" contains the correct string. If, on the other hand, the answer is 'No', or the Return key is pressed, the system hangs and it is necessary to force the exit killing the Matlab process (that results no more responding to the operating system) to restore the working environment.

It should be noticed that this appens on a M1 based Mac Studio computer running under Ventura 13.1 operating system: the same command scheduled on Intel based iMac (same operating system and Matlab version) works properly.

Any further observation or suggestion will be greatly appeciated.

Alessandro

Answer 2

[Alessandro Passeri]

Hello Aashita,

I would like to apologize for a deep inaccuracy that I expressed in my previous response to your suggestions.

In fact, I had not correctly followed the link n°1 you indicated. By repeating that procedure, and in particular by deleting both the file

~/Library/Preferences/com.apple.universalaccess.plist

that, above all, the

~/Library/Preferences/com.apple.universalaccessAuthWarning.plist

file, Matlab works fine, without showing any of the errors and malfunctions I reported.

Thank you for your help

Alessandro

[Aashita Dutta]

Hi Alessandro,

Glad to hear that the issue is resolved now.

Thank you!