Traceback (most recent call last):
  File "/usr/bin/apt-clone", line 97, in <module>
    args.source, args.destination, args.new_distro_codename)
  File "/usr/lib/python2.7/dist-packages/apt_clone.py", line 269, in restore_state
    self._restore_package_selection(statefile, targetdir)
  File "/usr/lib/python2.7/dist-packages/apt_clone.py", line 353, in _restore_package_selection
    cache.update(self.fetch_progress)
  File "/usr/lib/python2.7/dist-packages/apt/deprecation.py", line 98, in deprecated_function
    return func(*args, **kwds)
  File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 364, in update
    raise FetchFailedException(e)
FetchFailedException: W:Failed to fetch cdrom://Ubuntu 11.04 _Natty Narwhal_ - Beta i386 (20110330)/dists/natty/main/binary-i386/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, W:Failed to fetch cdrom://Ubuntu 11.04 _Natty Narwhal_ - Beta i386 (20110330)/dists/natty/restricted/binary-i386/Packages  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
, E:Some index files failed to download. They have been ignored, or old ones used instead.