update-manager crashed with aptdaemon.errors.AptDaemonError in _convert_dbus_exception(): org.debian.apt: Could not cancel transaction

[Charles Lease]

not really sure what caused this....

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: update-manager 1:15.10.3
ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6
Uname: Linux 4.4.0-17-generic x86_64
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Apr 5 09:32:05 2016
ExecutablePath: /usr/bin/update-manager
GsettingsChanges:
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'696'
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'window-width' b'1215'
 b'com.ubuntu.update-manager' b'launch-time' b'1459862804'
InstallationDate: Installed on 2016-01-28 (67 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160128)
InterpreterPath: /usr/bin/python3.5
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/update-manager
ProcEnviron:
 PATH=(custom, no user)
 SHELL=/bin/bash
 LANG=en_US.UTF-8
 LANGUAGE=en_US
 XDG_RUNTIME_DIR=<set>
PythonArgs: ['/usr/bin/update-manager']
SourcePackage: update-manager
Title: update-manager crashed with aptdaemon.errors.AptDaemonError in _convert_dbus_exception(): org.debian.apt: Could not cancel transaction
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1209219, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.