in my case the message displayed says ; ( unresolvable problem occoured
while calculating the upgrade the package'unity' is marked for removal
but it is in the removal blacklist) this is followed by the possible
causes of which none apply
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[Expired for update-manager (Ubuntu) because there has been no activity
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** Changed in: update-manager (Ubuntu)
Status: Incomplete => Expired
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Please attach the files from within /var/log/dist-upgrade.
Thanks.
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** Changed in: update-manager (Ubuntu)
Status: New => Incomplete
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Bugs, which
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https://bugs.launchpad.net/bugs/877427
Title:
insufficient information when upgrade to Ubuntu 12.04 fails
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