Trying to run backup before upgrade something is broken

Help with Unusual Circumstances
1

When I run

management/backup.py

I get the following:

Traceback (innermost last):
  File "/usr/bin/duplicity", line 87, in <module>
    with_tempdir(main)
  File "/usr/bin/duplicity", line 70, in with_tempdir
    fn()
  File "/usr/lib/python3/dist-packages/duplicity/dup_main.py", line 1585, in main
    do_backup(action)
  File "/usr/lib/python3/dist-packages/duplicity/dup_main.py", line 1607, in do_backup
    action).set_values()
  File "/usr/lib/python3/dist-packages/duplicity/dup_collections.py", line 762, in set_values
    backup_chains)
  File "/usr/lib/python3/dist-packages/duplicity/dup_collections.py", line 775, in set_matched_chain_pair
    sig_chains = sig_chains and self.get_sorted_chains(sig_chains)
  File "/usr/lib/python3/dist-packages/duplicity/dup_collections.py", line 992, in get_sorted_chains
    assert len(chain_list) == 2
 AssertionError

Something is wrong with the backup: ERROR 30 AssertionError
. Traceback (innermost last):
.   File "/usr/bin/duplicity", line 87, in <module>
.     with_tempdir(main)
.   File "/usr/bin/duplicity", line 70, in with_tempdir
.     fn()
.   File "/usr/lib/python3/dist-packages/duplicity/dup_main.py", line 1585, in main
.     do_backup(action)
.   File "/usr/lib/python3/dist-packages/duplicity/dup_main.py", line 1607, in do_backup
.     action).set_values()
.   File "/usr/lib/python3/dist-packages/duplicity/dup_collections.py", line 762, in set_values
.     backup_chains)
.   File "/usr/lib/python3/dist-packages/duplicity/dup_collections.py", line 775, in set_matched_chain_pair
.     sig_chains = sig_chains and self.get_sorted_chains(sig_chains)
.   File "/usr/lib/python3/dist-packages/duplicity/dup_collections.py", line 992, in get_sorted_chains
.     assert len(chain_list) == 2
.  AssertionError
.

Iā€™m trying to upgrade from being stuck on 57a to 60.1 however the upgrade breaks so I was following the instructions here: Mail-in-a-Box Maintenance Guide (mailinabox.email) and that is when I found this problem with the backup command.

1 Like
2

Try running sudo mailinabox and rebooting. Then try again.

3

I tried, and it has the same output.