[Bug 781284] Re: update-manager crashed with SystemError in required_download(): E:Method has died unexpectedly!, E:Sub-process returned an error code (100), E:Method /usr/lib/apt/methods/ did not start correctly

[Apport retracing service]

*** This bug is a duplicate of bug 659438 ***
    https://bugs.launchpad.net/bugs/659438

Thank you for taking the time to report this crash and helping to make
Ubuntu better.  This particular crash has already been reported and is a
duplicate of bug #764768, so is being marked as such.  Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** Tags removed: need-duplicate-check

** Attachment removed: "Dependencies.txt"
   https://bugs.launchpad.net/bugs/781284/+attachment/2124659/+files/Dependencies.txt

** Attachment removed: "ProcMaps.txt"
   https://bugs.launchpad.net/bugs/781284/+attachment/2124660/+files/ProcMaps.txt

** Attachment removed: "ProcStatus.txt"
   https://bugs.launchpad.net/bugs/781284/+attachment/2124661/+files/ProcStatus.txt

** This bug has been marked a duplicate of bug 659438
   Installation/Removal fails because of package which could not be located (failure in apt.Cache.required_download)

** Visibility changed to: Public

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https://bugs.launchpad.net/bugs/781284

Title:
  update-manager crashed with SystemError in required_download():
  E:Method  has died unexpectedly!, E:Sub-process  returned an error
  code (100), E:Method /usr/lib/apt/methods/ did not start correctly

Status in “update-manager” package in Ubuntu:
  New

Bug description:
  Binary package hint: update-manager

  Since I Updated to Natty, the problem persists

  ProblemType: Crash
  DistroRelease: Ubuntu 11.04
  Package: update-manager 1:0.147.6
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic i686
  NonfreeKernelModules: nvidia
  Architecture: i386
  Date: Wed May 11 19:01:34 2011
  ExecutablePath: /usr/bin/update-manager
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python2.7 /usr/bin/update-manager --no-focus-on-map
  ProcEnviron:
   LANGUAGE=es:en
   LANG=es_ES.utf8
   SHELL=/bin/bash
  PythonArgs: ['/usr/bin/update-manager', '--no-focus-on-map']
  SourcePackage: update-manager
  Title: update-manager crashed with SystemError in required_download(): E:Method  has died unexpectedly!, E:Sub-process  returned an error code (100), E:Method /usr/lib/apt/methods/ did not start correctly
  UpgradeStatus: Upgraded to natty on 2011-04-20 (21 days ago)
  UserGroups: adm admin audio cdrom dialout dip disk fax floppy fuse lpadmin netdev plugdev sambashare tape video