failed downloading packages of upgrade

[Julian David Silva Rueda]

the upgrade was canceled, information available inform a bad name of package upgrade

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.19.0-65.73~14.04.1-generic 3.19.8-ckt22
Uname: Linux 3.19.0-65-generic i686
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: i386
CrashDB: ubuntu
Date: Sun Aug 7 23:02:06 2016
InstallationDate: Installed on 2015-09-30 (313 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta i386 (20150805)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=es_CO:es
 PATH=(custom, no user)
 LANG=es_CO.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-08-08 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2016-08-07 22:54:31.271402
 Log time: 2016-08-07 22:54:54.331458
 Log time: 2016-08-07 23:01:55.825811
 Log time: 2016-08-07 23:02:19.468052
VarLogDistupgradeTermlog: