2016-06-17 16:19:04,754 INFO Using config files '['./DistUpgrade.cfg']'
2016-06-17 16:19:04,754 INFO uname information: 'Linux klace 4.2.0-38-generic #45-Ubuntu SMP Wed Jun 8 21:21:49 UTC 2016 x86_64'
2016-06-17 16:19:05,150 INFO apt version: '1.0.10.2ubuntu3'
2016-06-17 16:19:05,150 INFO python version: '3.4.3+ (default, Oct 14 2015, 16:03:50) 
[GCC 5.2.1 20151010]'
2016-06-17 16:19:05,152 INFO release-upgrader version '16.04.14' started
2016-06-17 16:19:05,264 INFO locale: 'en_GB' 'UTF-8'
2016-06-17 16:19:05,505 DEBUG Using 'DistUpgradeViewGtk3' view
2016-06-17 16:19:05,587 DEBUG aufsOptionsAndEnvironmentSetup()
2016-06-17 16:19:05,590 DEBUG using '/tmp/upgrade-rw-glpl8o0w' as aufs_rw_dir
2016-06-17 16:19:05,590 DEBUG using '/tmp/upgrade-chroot-vl948tqh' as aufs chroot dir
2016-06-17 16:19:05,591 DEBUG enable dpkg --force-overwrite
2016-06-17 16:19:05,620 DEBUG creating statefile: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'
2016-06-17 16:19:09,242 DEBUG lsb-release: 'wily'
2016-06-17 16:19:09,243 DEBUG _pythonSymlinkCheck run
2016-06-17 16:19:09,244 DEBUG openCache()
2016-06-17 16:19:09,244 DEBUG No such plugin directory: ./plugins
2016-06-17 16:19:09,244 DEBUG plugins for condition 'PreCacheOpen' are '[]'
2016-06-17 16:19:09,244 DEBUG plugins for condition 'xenialPreCacheOpen' are '[]'
2016-06-17 16:19:09,244 DEBUG plugins for condition 'from_wilyPreCacheOpen' are '[]'
2016-06-17 16:19:09,244 DEBUG quirks: running PreCacheOpen
2016-06-17 16:19:09,244 DEBUG running Quirks.PreCacheOpen
2016-06-17 16:19:09,924 DEBUG /openCache(), new cache size 77146
2016-06-17 16:19:09,924 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
2016-06-17 16:19:09,925 DEBUG checkViewDepends()
2016-06-17 16:19:09,925 DEBUG depends: 'apt (>= 1.0.10.2ubuntu2)'
2016-06-17 16:19:09,925 DEBUG checking: '[('apt', '1.0.10.2ubuntu2', '>=')]' 
2016-06-17 16:19:09,925 DEBUG running doUpdate() (showErrors=False)
2016-06-17 16:19:13,692 DEBUG openCache()
2016-06-17 16:19:17,633 DEBUG /openCache(), new cache size 77146
2016-06-17 16:19:17,633 DEBUG doPostInitialUpdate
2016-06-17 16:19:17,633 DEBUG plugins for condition 'PostInitialUpdate' are '[]'
2016-06-17 16:19:17,633 DEBUG plugins for condition 'xenialPostInitialUpdate' are '[]'
2016-06-17 16:19:17,633 DEBUG plugins for condition 'from_wilyPostInitialUpdate' are '[]'
2016-06-17 16:19:21,394 DEBUG MetaPkgs: ubuntu-desktop
2016-06-17 16:19:25,479 DEBUG Foreign: 
2016-06-17 16:19:25,479 DEBUG Obsolete: 
2016-06-17 16:19:25,480 DEBUG updateSourcesList()
2016-06-17 16:19:25,539 DEBUG rewriteSourcesList() with mirror_check
2016-06-17 16:19:25,540 DEBUG ['ubuntu-minimal', 'ubuntu-standard']
2016-06-17 16:19:25,540 DEBUG Checking pkg: ubuntu-minimal
2016-06-17 16:19:25,541 DEBUG Checking pkg: ubuntu-standard
2016-06-17 16:19:25,542 DEBUG examining: 'deb http://gb.archive.ubuntu.com/ubuntu/ wily main'
2016-06-17 16:19:25,542 DEBUG entry 'deb http://gb.archive.ubuntu.com/ubuntu/ xenial main' updated to new dist
2016-06-17 16:19:25,542 DEBUG examining: 'deb http://gb.archive.ubuntu.com/ubuntu/ wily-updates main'
2016-06-17 16:19:25,542 DEBUG entry 'deb http://gb.archive.ubuntu.com/ubuntu/ xenial-updates main' updated to new dist
2016-06-17 16:19:25,542 DEBUG examining: 'deb http://gb.archive.ubuntu.com/ubuntu/ wily universe'
2016-06-17 16:19:25,543 DEBUG entry 'deb http://gb.archive.ubuntu.com/ubuntu/ xenial universe' updated to new dist
2016-06-17 16:19:25,543 DEBUG examining: 'deb http://gb.archive.ubuntu.com/ubuntu/ wily-updates universe'
2016-06-17 16:19:25,543 DEBUG entry 'deb http://gb.archive.ubuntu.com/ubuntu/ xenial-updates universe' updated to new dist
2016-06-17 16:19:25,543 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu wily-security main'
2016-06-17 16:19:25,543 DEBUG entry 'deb http://security.ubuntu.com/ubuntu xenial-security main' updated to new dist
2016-06-17 16:19:25,543 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu wily-security universe'
2016-06-17 16:19:25,543 DEBUG entry 'deb http://security.ubuntu.com/ubuntu xenial-security universe' updated to new dist
2016-06-17 16:19:25,545 DEBUG running doUpdate() (showErrors=True)
2016-06-17 16:20:30,276 DEBUG openCache()
2016-06-17 16:20:30,276 DEBUG failed to SystemUnLock() (E:Not locked) 
2016-06-17 16:20:39,984 DEBUG /openCache(), new cache size 81709
2016-06-17 16:20:39,984 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
2016-06-17 16:21:35,967 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
2016-06-17 16:21:35,967 DEBUG abort called
2016-06-17 16:21:35,971 DEBUG openCache()
2016-06-17 16:21:35,971 DEBUG failed to SystemUnLock() (E:Not locked) 
2016-06-17 16:21:44,521 DEBUG /openCache(), new cache size 77146
2016-06-17 16:21:44,521 DEBUG enabling apt cron job