The root cause of the error is Sep 11 20:11:55 ubuntu ubiquity: Traceback (most recent call last): Sep 11 20:11:55 ubuntu ubiquity: File "/usr/bin/apt-clone", line 113, in <module> Sep 11 20:11:55 ubuntu ubiquity: args.source, args.destination, args.new_distro_codename, protect_installed) Sep 11 20:11:55 ubuntu ubiquity: File "/usr/lib/python2.7/dist-packages/apt_clone.py", line 305, in restore_state Sep 11 20:11:55 ubuntu ubiquity: self._restore_package_selection(statefile, targetdir, protect_installed) Sep 11 20:11:55 ubuntu ubiquity: File "/usr/lib/python2.7/dist-packages/apt_clone.py", line 426, in _restore_package_selection Sep 11 20:11:55 ubuntu ubiquity: self._restore_package_selection_in_cache(statefile, cache, protect_installed) Sep 11 20:11:55 ubuntu ubiquity: File "/usr/lib/python2.7/dist-packages/apt_clone.py", line 406, in _restore_package_selection_in_cache Sep 11 20:11:55 ubuntu ubiquity: resolver.resolve() Sep 11 20:11:55 ubuntu ubiquity: SystemError: E:Unable to correct problems, you have held broken packages.
Which is caused by Sep 11 20:05:31 ubuntu ubiquity: WARNING:root:can't add at-spi (pkg at-spi not marked upgrade) (bug 836798?)
This situation should handled more nicely than a python traceback
The root cause of the error is apt-clone" , line 113, in <module> distro_ codename, protect_installed) python2. 7/dist- packages/ apt_clone. py", line 305, in restore_state package_ selection( statefile, targetdir, protect_installed) python2. 7/dist- packages/ apt_clone. py", line 426, in _restore_ package_ selection package_ selection_ in_cache( statefile, cache, protect_installed) python2. 7/dist- packages/ apt_clone. py", line 406, in _restore_ package_ selection_ in_cache
Sep 11 20:11:55 ubuntu ubiquity: Traceback (most recent call last):
Sep 11 20:11:55 ubuntu ubiquity: File "/usr/bin/
Sep 11 20:11:55 ubuntu ubiquity: args.source, args.destination, args.new_
Sep 11 20:11:55 ubuntu ubiquity: File "/usr/lib/
Sep 11 20:11:55 ubuntu ubiquity: self._restore_
Sep 11 20:11:55 ubuntu ubiquity: File "/usr/lib/
Sep 11 20:11:55 ubuntu ubiquity: self._restore_
Sep 11 20:11:55 ubuntu ubiquity: File "/usr/lib/
Sep 11 20:11:55 ubuntu ubiquity: resolver.resolve()
Sep 11 20:11:55 ubuntu ubiquity: SystemError: E:Unable to correct problems, you have held broken packages.
Which is caused by
Sep 11 20:05:31 ubuntu ubiquity: WARNING:root:can't add at-spi (pkg at-spi not marked upgrade)
(bug 836798?)
This situation should handled more nicely than a python traceback