Backup fails

I have no idea what is happening. But here is a trace back. Sorry I cannot be more useful!

Traceback (most recent call last):
  File "/usr/bin/duplicity", line 1494, in <module>
    with_tempdir(main)
  File "/usr/bin/duplicity", line 1488, in with_tempdir
    fn()
  File "/usr/bin/duplicity", line 1337, in main
    do_backup(action)
  File "/usr/bin/duplicity", line 1366, in do_backup
    sync_archive(decrypt)
  File "/usr/bin/duplicity", line 1100, in sync_archive
    remote_metafiles, ignored, rem_needpass = get_metafiles(remlist)
  File "/usr/bin/duplicity", line 992, in get_metafiles
    pr = file_naming.parse(fn)
  File "/usr/lib/python2.7/dist-packages/duplicity/file_naming.py", line 389, in parse
    pr = check_full()
  File "/usr/lib/python2.7/dist-packages/duplicity/file_naming.py", line 308, in check_full
    t = str2time((m1 or m2).group("time"), short)
  File "/usr/lib/python2.7/dist-packages/duplicity/file_naming.py", line 281, in str2time
    t = dup_time.genstrtotime(timestr.upper())
  File "/usr/lib/python2.7/dist-packages/duplicity/dup_time.py", line 278, in genstrtotime
    return override_curtime - intstringtoseconds(timestr)
  File "/usr/lib/python2.7/dist-packages/duplicity/dup_time.py", line 190, in intstringtoseconds
    error()
  File "/usr/lib/python2.7/dist-packages/duplicity/dup_time.py", line 181, in error
    raise TimeException(bad_interval_string % interval_string)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xea in position 15: ordinal not in range(128)