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So I'm trying to upgrade from Onereic to Pangolin using the Update Manager. Fine. Except that I get this error in the "Setting new software channels" phase;

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade:
E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.



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 update-manager' in a terminal. 

I do have a lot of PPAs, but I've disabled all of them. Someone told me to use ppa-purge on all of them, but I don't think I'm doing it correctly. Remember, I've successfully upgraded to 11.10 FROM 11.04 with all of these PPAs activated. Any tips?

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Open your terminal and run these commands:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo apt-get do-release-upgrade

Then try again.

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