Meaning of Synaptic message
When I try to mark a particular package for installation in Synaptic, first I get the understandable message, 'Mark Additional Required Changes ?' and after I choose 'Mark' I receive the "Could not mark all packages for installation or Upgrade' and in the unresolvable packages list I have lines like:
Depends: libqt4-core (=4.1.2-1ubuntu1) but 4.2.1-1mepis1 is to be installed
What is this line telling me ?