Ugrade abortion

[Bret Busby]

Hello.

Tried to perform system upgrade from UbuntuMATE 21.04 to 21.10, as I
believed (quite wrongly, it seems) that 21.10 should have stabilised
by now.

I did this using the Software Updater application, after updating
21.04 ("Your system is up to date. However, a new version is
available; 21.10 . <Update> <Okay>" (or, something to that effect) ).

About 1230 packages were downloaded, then, the version upgrade began
installing the packages.

After a while, the Software Updater crashed, displaying only the error message
"
Could not install the upgrades
The upgrade has aborted. Your system could be in an unusable state. A
recovery will run now (dpkg --configure -a)
"

Tried getting a screenshot, but the Take Screenshot application will
not save the screenshot, after the abortion.

Then, clicking the <Close> button,  the following is displayed.

"
Upgrade complete
The upgrade has completed but there were errors during the upgrade
process. <Close>
"

Then, upon clicking "Close", the underlying window, that displayed
some information about one of the errors, disappeared.

Is Ubuntu 21.10 like Debian Experimental, by design, as well as in practice?


-- 
Bret Busby
Armadale
West Australia
(UTC+0800)
..............