[Bug 1807419] Re: ubuntu-bug ubuntu-release-upgrader-core

[zubin]

I removed ibav-tools, and ffmpeg , but still no change. i cannot
upgrade.

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https://bugs.launchpad.net/bugs/1807419

Title:
  ubuntu-bug ubuntu-release-upgrader-core

Status in ubuntu-release-upgrader package in Ubuntu:
  Incomplete

Bug description:
  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

   This can be caused by:
   * Upgrading to a pre-release version of Ubuntu
   * Running the current pre-release version of Ubuntu
   * Unofficial software packages not provided by Ubuntu

  If none of this applies, then please report this bug using the command
  'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.26
  ProcVersionSignature: Ubuntu 4.4.0-139.165-generic 4.4.160
  Uname: Linux 4.4.0-139-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Dec  7 21:46:55 2018
  InstallationDate: Installed on 2014-01-19 (1783 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to xenial on 2018-12-07 (0 days ago)
  VarLogDistupgradeTermlog:

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