Comment 9 for bug 780270

I have a similar error, though the error backtrace doesn't look exactly the same as in the original report:

Traceback (most recent call last):
  File "/usr/bin/duplicity", line 1347, in <module>
    with_tempdir(main)
  File "/usr/bin/duplicity", line 1330, in with_tempdir
    fn()
  File "/usr/bin/duplicity", line 1300, in main
    full_backup(col_stats)
  File "/usr/bin/duplicity", line 469, in full_backup
    globals.backend)
  File "/usr/bin/duplicity", line 347, in write_multivol
    globals.gpg_profile, globals.volsize)
  File "/usr/lib/python2.7/site-packages/duplicity/gpg.py", line 313, in GPGWriteFile
    file = GPGFile(True, path.Path(filename), profile)
  File "/usr/lib/python2.7/site-packages/duplicity/gpg.py", line 143, in __init__
    'logger': self.logger_fp})
  File "/usr/lib/python2.7/site-packages/duplicity/GnuPGInterface.py", line 365, in run
    create_fhs, attach_fhs)
  File "/usr/lib/python2.7/site-packages/duplicity/GnuPGInterface.py", line 407, in _attach_fork_exec
    process.pid = os.fork()
OSError: [Errno 12] Cannot allocate memory