[Bug 950784] Re: Could not calculate the upgrade on update manager

[Dejas]

Distribution Upgrade error while upgrading from 12.04 to 14.04:
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.

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https://bugs.launchpad.net/bugs/950784

Title:
  Could not calculate the upgrade on update manager

Status in update-manager package in Ubuntu:
  Invalid

Bug description:
  This is the message from update manager when I check the updates

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  Please report this bug against the 'update-manager' package and include the following error message:
  'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
  ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
  rayan at rayan-Inspiron-N5110:~$ lsb_release -rd
  Description:	Ubuntu precise (development branch)
  Release:	12.04

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