Error using open (line 143) failed to open matlab editor

Whenever I open any matlab file that I previously created using MATLAB2021, this message appears! "Error using open (line 143) failed to open matlab editor" and it doesn't open what do I do?

[Walter Roberson]

Windows? or Linux?

[Omar Reda]

Windows

[Walter Roberson]

Check your Windows Defender settings to ensure that MATLAB is not blocked from opening TCP connections to the same machine. Some key functionality such as Simulink and the help browser and the symbolic mathematics engine are implemented by starting additional processes on the same machine and communicating with them using TCP or UDP.

[Omar Reda]

How do I check?

[Walter Roberson]

https://www.action1.com/how-to-block-or-allow-tcp-ip-port-in-windows-firewall/ and check the outbound rules

Answer 1

[Image Analyst]

What was the file extension? .m? .fig? .mlapp? How exactly did you try to open it? Double clicking on it in the Current Folder panel? Typing something on the command line?

Could be an installation issue. Have you tried reinstalling? If so, then see the FAQ:

https://matlab.fandom.com/wiki/FAQ#After_installation,_MATLAB_crashes_or_gives_an_error_message_when_I_try_to_run_MATLAB.

[Omar Reda]

.m, and yes I either double click it from folder panel or drag it to matlab or even open it from matlab itself and then the message appears!

Answer 2

[Image Analyst]

OK, will you answer the other question about if you tried reinstalling?

And does this happen for all .m files, or just one particular one?

If you reinstalled and it's still broken then call the Mathworks tomorrow for installation help.

https://matlab.fandom.com/wiki/FAQ#After_installation,_MATLAB_crashes_or_gives_an_error_message_when_I_try_to_run_MATLAB.

[Omar Reda]

For all files

[Image Analyst]

OK, AGAIN (third time), will you answer the other question about if you tried reinstalling?

Is this Windows? If so, use the Windows "Steps Recorder" (type it in the task bar search box) to make a screen capture of your steps, then attach the zip file here.

[Omar Reda]

Do I have to reinstall?