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Recently, when running the update manager, and after checking package info. shows this message.

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.'
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what message do you if you type "sudo apt-get update" followed by "sudo apt-get upgrade" in a terminal Ahmed? – Allan Feb 24 '11 at 22:21
Are you upgrading 10.04 → 10.10, or something else? Can you also tar/zip the folder /var/log/dist-upgrade and upload it somewhere so that we can have a look at it? – arrange Feb 24 '11 at 22:23
no error appear after typing "sudo apt-get update", but after "sudo apt-get upgrade" asked me to download 684MB updates. -allan – Ahmed Refaat Feb 24 '11 at 23:07
no i'm not upgrading for 10.10, so the folder dist-upgrade is empty! -arrange – Ahmed Refaat Feb 24 '11 at 23:08
OK, so can you post or upload somewhere the output of sudo apt-get upgrade? (You can say cancel the upgrade then when asked for confirmation.) – arrange Feb 25 '11 at 9:35

Download the updates and see what happens. sudo apt-get upgrade

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