warndlg() and msgbox() not passing string

Hello,

All of a sudden, warndlg() and msgbox() don't pass the string.

If I type

warndlg('My Warning','Title')

the dialog box has the correct title, but no warning icon and no message! Same with msgbox()

Any ideas?

Thanks.

Doug Anderson

[Stephen23]

Please show the complete output of these two commands:

which warndlg -all
which msgbox -all

[Douglas Anderson]

For warndlg

C:\Program Files\MATLAB\R2021a\toolbox\matlab\uitools\warndlg.m

For msgbox

C:\Program Files\MATLAB\R2021a\toolbox\matlab\uitools\msgbox.m

[Rik]

These functions do OS API calls, so might something have broken there?

[Douglas Anderson]

I have no idea what OS API calls are! How do I test?

[Douglas Anderson]

I just exited MATLAB and started up again, and it's working again, so I guess that the OS API (?) was indeed broken!

Thanks.

[Rik]

The operating system (OS, so Windows, MacOS, Ubuntu, Arch, etc) provides an application program interface (API) to do things like determining what files are in a folder etc. One of the things the OS can do is make a window. That is why the documentation warns that the windows may look differently between operating systems.

[Douglas Anderson]

Thanks Rik. Your comment was a good clue to just restart MATLAB.

Answer 1

[Douglas Anderson]

When all else fails, Reboot! :)