Thanks for your report. The upgrade is blocked by ibm-lotus-notes which depends on grep:i386, but installing this version of grep would remove grep:amd64 which is an essential package and cannot be removed.
>From apt.log === Investigating (0) ibm-lotus-notes [ i386 ] < 8.5.3-20110916.0921 > ( IBM ) Broken ibm-lotus-notes:i386 Depends on grep [ i386 ] < 2.14-1 -> 2.14-3 > ( utils ) Considering grep:i386 5001 as a solution to ibm-lotus-notes:i386 4 Removing ibm-lotus-notes:i386 rather than change grep:i386 Investigating (0) ibm-lotus-notes-fixpack [ i386 ] < 8.5.3-20130329.1426.FP4 > ( IBM ) Broken ibm-lotus-notes-fixpack:i386 Depends on ibm-lotus-notes [ i386 ] < 8.5.3-20110916.0921 > ( IBM ) (= 8.5.3-20110916.0921) Considering ibm-lotus-notes:i386 4 as a solution to ibm-lotus-notes-fixpack:i386 -2 Removing ibm-lotus-notes-fixpack:i386 rather than change ibm-lotus-notes:i386 === Please report this problem to the maintainer of ibm-lotus-notes. I'm closing this report because it is not a problem with Ubuntu. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1309361 Title: Kubuntu upgrade from 13.04 to 13.10 failed: "could not calculate the upgrade" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1309361/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs