I tried to update the server, and in spite of the fact that updates of packets were available, univention-upgrade --check showed absence (package updates: none)
univention-upgrade --check
Starting univention-upgrade. Current UCS version is 4.1-3 errata282
Checking for package updates: none
Checking for app updates: none
Checking for release updates: found: UCS 4.1-4
Please rerun command without --check argument to install.
apt-get upgrade has shown
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
univention-management-console-dev
solution, for example:
# univention-remove univention-management-console-dev univention-ucs-translation-template
....
# univention-upgrade --check
Starting univention-upgrade. Current UCS version is 4.1-3 errata282
Checking for package updates: found
The following packages will be installed:
linux-image-4.1.0-ucs207-amd64,linux-image-4.1.0-ucs207-amd64-signed
The following packages will be upgraded:
perl,.......,univention-pam
Do you want to continue [Y|n]? n
Checking for app updates: none
Checking for release updates: found: UCS 4.1-4
Do you want to update to 4.1-4 [Y|n]? n