It looks like you have an older version of duplicity installed in addition to the current version.
Please use this command to locate the older duplicity dir(s): $ find /usr -type d -name duplicity -exec ls -ld {} \; Then use: $ sudo rm -rf <older duplicity dir> Then use this command to locate the older duplicity exec(s): $ ls -l `which -a duplicity` Then use: $ sudo rm -f <older duplicity exec> It should work then. On Sun, Mar 13, 2022 at 2:39 PM Paul Galbraith <p...@galbraiths.ca> wrote: > Package: duplicity > > Version: 0.8.17-1 > > > When using a b2 backend, there is an error in "list_file_names": > > > # FTP_PASSWORD=password PASSPHRASE=key duplicity full /home/test > b2://id@bucket/home/test > > Local and Remote metadata are synchronized, no sync needed. > > Last full backup date: none > > Attempt 1 failed. TypeError: list_file_names() takes from 4 to 6 > positional arguments but 7 were given > >