xy@ubuntu:~$ FTP_PASSWORD=XY duplicity Dropbox/BackupUbuntu/scripts/ b2://XY@bucket_name/123/ -v9
Using archive dir: /home/xy/.cache/duplicity/85c10ebc077324ba1046a9e8fb0e6b61
Using backup name: 85c10ebc077324ba1046a9e8fb0e6b61
Import of duplicity.backends.azurebackend Succeeded
Import of duplicity.backends.b2backend Succeeded
Import of duplicity.backends.botobackend Succeeded
Import of duplicity.backends.cfbackend Succeeded
Import of duplicity.backends.copycombackend Succeeded
Import of duplicity.backends.dpbxbackend Succeeded
Import of duplicity.backends.gdocsbackend Succeeded
Import of duplicity.backends.giobackend Succeeded
Import of duplicity.backends.hsibackend Succeeded
Import of duplicity.backends.hubicbackend Succeeded
Import of duplicity.backends.imapbackend Succeeded
Import of duplicity.backends.lftpbackend Succeeded
Import of duplicity.backends.localbackend Succeeded
Import of duplicity.backends.megabackend Succeeded
Import of duplicity.backends.multibackend Succeeded
Import of duplicity.backends.ncftpbackend Succeeded
Import of duplicity.backends.onedrivebackend Succeeded
Import of duplicity.backends.par2backend Succeeded
Import of duplicity.backends.pydrivebackend Succeeded
Import of duplicity.backends.rsyncbackend Succeeded
Import of duplicity.backends.ssh_paramiko_backend Succeeded
Import of duplicity.backends.ssh_pexpect_backend Succeeded
Import of duplicity.backends.swiftbackend Succeeded
Import of duplicity.backends.sxbackend Succeeded
Import of duplicity.backends.tahoebackend Succeeded
Import of duplicity.backends.webdavbackend Succeeded
Main action: inc
================================================================================
duplicity 0.7.06 ($reldate)
Args: /usr/bin/duplicity Dropbox/BackupUbuntu/scripts/ b2://XY@bucket_name/ -v9
Linux ubuntu 3.13.0-63-generic #103-Ubuntu SMP Fri Aug 14 21:42:59 UTC 2015 x86_64 x86_64
/usr/bin/python 2.7.6 (default, Jun 22 2015, 17:58:13) 
[GCC 4.8.2]
================================================================================
Using temporary directory /tmp/duplicity-zH79kC-tempdir
Registering (mkstemp) temporary file /tmp/duplicity-zH79kC-tempdir/mkstemp-u_4k58-1
Temp has 1951010816 available, backup will use approx 34078720.
Synchronizing remote metadata to local cache...
PASSPHRASE variable not set, asking user.
GnuPG passphrase: 
Copying duplicity-full-signatures.20151204T231414Z.sigtar.gpg to local cache.
Registering (mktemp) temporary file /tmp/duplicity-zH79kC-tempdir/mktemp-UWEmYm-2
Backtrace of previous error: Traceback (innermost last):
  File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 365, in inner_retry
    return fn(self, *args)
  File "/usr/lib/python2.7/dist-packages/duplicity/backend.py", line 563, in get
    self.backend._get(remote_filename, local_path)
  File "/usr/lib/python2.7/dist-packages/duplicity/backends/b2backend.py", line 90, in _get
    resp = self.get_or_post(url, None)
  File "/usr/lib/python2.7/dist-packages/duplicity/backends/b2backend.py", line 256, in get_or_post
    with OpenUrl(url, data, encoded_headers) as resp:
  File "/usr/lib/python2.7/dist-packages/duplicity/backends/b2backend.py", line 332, in __enter__
    self.file = urllib2.urlopen(request)
  File "/usr/lib/python2.7/urllib2.py", line 127, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib/python2.7/urllib2.py", line 410, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 523, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 448, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 531, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
 HTTPError: HTTP Error 404: Not Found

Attempt 1 failed. HTTPError: HTTP Error 404: Not Found