I experienced this with deja-dup 32.0-0ubuntu5 and duplicity 0.7.01-1ubuntu1. I think it's caused by this bug in duplicity:
https://bugs.launchpad.net/duplicity/+bug/1411803 That bug has been fixed in duplicity 0.7.02. I installed duplicity 0.7.02 from source, and I am no longer experiencing the problem. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to deja-dup in Ubuntu. https://bugs.launchpad.net/bugs/1422289 Title: Backup failed with duplicity assertion error Status in deja-dup package in Ubuntu: Confirmed Bug description: I have configured deja-dup to backup to an S3 folder and recently all backups are failing with this error: Traceback (most recent call last): File "/usr/bin/duplicity", line 1500, in <module> with_tempdir(main) File "/usr/bin/duplicity", line 1494, in with_tempdir fn() File "/usr/bin/duplicity", line 1327, in main action = commandline.ProcessCommandLine(sys.argv[1:]) File "/usr/lib/python2.7/dist-packages/duplicity/commandline.py", line 1047, in ProcessCommandLine globals.backend = backend.get_backend(args[0]) File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 221, in get_backend obj = get_backend_object(url_string) File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 207, in get_backend_object return factory(pu) File "/usr/lib/python2.7/dist-packages/duplicity/backends/_boto_single.py", line 161, in __init__ self.resetConnection() File "/usr/lib/python2.7/dist-packages/duplicity/backends/_boto_single.py", line 183, in resetConnection self.conn = get_connection(self.scheme, self.parsed_url, self.storage_uri) File "/usr/lib/python2.7/dist-packages/duplicity/backends/_boto_single.py", line 97, in get_connection assert scheme == 's3' AssertionError ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: deja-dup 32.0-0ubuntu2 ProcVersionSignature: Ubuntu 3.18.0-13.14-generic 3.18.5 Uname: Linux 3.18.0-13-generic x86_64 ApportVersion: 2.16.1-0ubuntu2 Architecture: amd64 CurrentDesktop: Unity Date: Mon Feb 16 10:48:38 2015 InstallationDate: Installed on 2015-01-09 (37 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150109) SourcePackage: deja-dup UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/deja-dup/+bug/1422289/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp