Comment 3 for bug 1086374

Starting this morning duplicity cannot list current files or verify on both my Ubuntu desktop at home and CentOS 6.5 server at OVH. I have made updates on my Ubuntu machine but no updates on my CentOS server unless OVH is doing some updates on it but I don't think so. Before today al was fine on both machines. I event did some tests with small backups and I have the same problem.

On My CentOS 6.5 machine I tried that:
duplicity --full-if-older-than 1M /backups/mysql-backups/ file:///mnt/nfs/toto/mysql
Les métadonnées locales et distantes sont déjà synchronisées. Aucune synchronisation nécessaire.
Date de la dernière sauvegarde complète : aucune
La dernière sauvegarde complète est trop ancienne, forçage d’une nouvelle sauvegarde complète
Phrase de passe GnuPG
Veuillez retaper la phrase de passe pour confirmer :
--------------[ Statistiques de sauvegarde ]--------------
StartTime 1457720231.30 (Fri Mar 11 13:17:11 2016)
EndTime 1457720237.78 (Fri Mar 11 13:17:17 2016)
ElapsedTime 6.48 (6.48 seconds)
SourceFiles 71
SourceFileSize 122610486 (117 MB)
NewFiles 71
NewFileSize 122610486 (117 MB)
DeletedFiles 0
ChangedFiles 0
ChangedFileSize 0 (0 bytes)
ChangedDeltaSize 0 (0 bytes)
DeltaEntries 71
RawDeltaSize 122606390 (117 MB)
TotalDestinationSizeChange 122582819 (117 MB)
Errors 0
----------------------------------------------------------

[root@ns519500 backups]# duplicity list-current-files file://mnt/nfs/toto/mysql/
Les métadonnées locales et distantes sont déjà synchronisées. Aucune synchronisation nécessaire.
Date de la dernière sauvegarde complète : aucune
Traceback (most recent call last):
  File "/bin/duplicity", line 1532, in <module>
    with_tempdir(main)
  File "/bin/duplicity", line 1526, in with_tempdir
    fn()
  File "/bin/duplicity", line 1380, in main
    do_backup(action)
  File "/bin/duplicity", line 1461, in do_backup
    list_current(col_stats)
  File "/bin/duplicity", line 696, in list_current
    sig_chain = col_stats.get_signature_chain_at_time(time)
  File "/usr/lib64/python2.7/site-packages/duplicity/collections.py", line 994, in get_signature_chain_at_time
    raise CollectionsError("No signature chains found")
CollectionsError: No signature chains found