cannot update from 13.10 to 14.04

[Luca Ferrari]

On Tue, Sep 30, 2014 at 10:42 AM, O. Sinclair <o.sinclair at gmail.com> wrote:
> also try command
> cat /etc/update-manager/release-upgrades
>

Yes, already tried to switch among lts and normal.
Here's my current configuration:

% cat /etc/update-manager/release-upgrades | grep -v "#"
                                       ~

[DEFAULT]
Prompt=normal