Sorry for my late response... > This seems to be the case when you run update-command-not-found without any > Contents-file downloaded. If you run "apt update" after installation it > works without problems.
Thanks for the hint. > I think update-command-not-found should make it clearer that you need to > update the apt-cache prior to running it. Indeed, that would be great. -- With kind regards, Christian Schrötter