Issues with installation on Ubuntu 16.04...

[macueto@…]

Hi,

After upgrading my operating system, Singular started to fail. I decided to re-install Singular. However, after following the procedure

sudo apt-get update sudo apt-get install singular

I get the following error:

Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:

The following packages have unmet dependencies:

singular : Depends: singular-ui

Depends: singular-modules but it is not going to be installed

E: Unable to correct problems, you have held broken packages.

[hannes]

Since Ubuntu 16 Singular is an official package - so we do not provide *.deb pacakges for Ubuntu 16. Unfortunatly, the sub packages of Singular have different names in the official repository.

Solution: remove the old Singular packages:

sudo apt-get purge singular
sudo apt-get autoclean

remove the line starting with deb ​ftp://jim.mathematik.uni-kl.de/repo/debian .... from /etc/apt/sources.list, update and install Singular as usual:

sudo apt-get install singular

Alternativly, follow ​http://www.singular.uni-kl.de/index.php/singular-download/109.html to install Singular independent of the package system.