@Willy - "/var/log/dist-upgrade/main.log" would be helpful in determining why the upgrade path could not be calculated. Additionally, it'd be best to only install apt and libapt-pkg4.12 from trusty-proposed instead of everything.
@Willy - "/var/log/ dist-upgrade/ main.log" would be helpful in determining why the upgrade path could not be calculated. Additionally, it'd be best to only install apt and libapt-pkg4.12 from trusty-proposed instead of everything.