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Using the GUI Updater which has always showed "Upgrade available" but I have ignored it -- up until today. :) Then got the errors.

The only two packages that I am aware of are BackInTime (BiT) and Wine and both have their PPAs defined and checked. After the first go around of errors I disabled the PPAs for Wine and BiT and the ERROR1 message went away, but still got ERROR 2.

I tried this but same again... Can't upgrade from 12.04LTS to 14.04LTS

How do I do the Upgrade? OR, is there some way to push all my 14.04 programs and data over to a clean install of 16.04?

ERROR 1: Preparing to Upgrade

Third party sources disabled Some third party entries in your sources.list were disabled. You can re-enable them after the upgrade with the 'software-properties' tool or your package manager.

ERROR2: Setting new software channels

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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Open "Software and Updates" and click the "Other Software" tab. Deselect any PPAs there and try again.

Screenshots coming soon.

  • Thanks, bit do not worry about pics. I had already done that, mentioned After the first go around of errors I disabled the PPAs for Wine and BiT and the ERROR1 message went away, but still got ERROR 2. – X10WannaBe May 19 '17 at 17:43

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