[Duplicity-talk] OSError: [Errno 24] Too many open files

[Diagon]

Ubuntu 16.04, and yes I'm still running 0.7.19.  Everything was fine until my 
cron scheduled backups stopped without warning on June 6th, as I just 
discovered.

Command line that looks something like:

PASSPHRASE="xxx" duplicity --log-file /home/me/duplicity.log 
--backend-retry-delay 60 --asynchronous-upload --name Remote --volsize 50 
--full-if-older-than 6M --exclude '**.lock' /home/dev/mydir 
sftp://me@server.com/Backup

Error below.  Any way around this until I get a new OS installed?

Thanks -

/usr/lib/python2.7/dist-packages/Crypto/Cipher/blockalgo.py:141: FutureWarning: 
CTR mode needs counter parameter, not IV
  self._cipher = factory.new(key, *args, **kwargs)
Local and Remote metadata are synchronized, no sync needed.
Last full backup date: Wed May 13 22:20:03 2020

ERROR 30 OSError
. Traceback (innermost last):
.   File "/usr/bin/duplicity", line 1581, in <module>
.     with_tempdir(main)
.   File "/usr/bin/duplicity", line 1567, in with_tempdir
.     fn()
.   File "/usr/bin/duplicity", line 1419, in main
.     do_backup(action)
.   File "/usr/bin/duplicity", line 1549, in do_backup
.     incremental_backup(sig_chain)
.   File "/usr/bin/duplicity", line 673, in incremental_backup
.     globals.backend)
.   File "/usr/bin/duplicity", line 435, in write_multivol
.     globals.volsize)
.   File "/usr/lib/python2.7/dist-packages/duplicity/gpg.py", line 378, in 
GPGWriteFile
.     file = GPGFile(True, path.Path(filename), profile)
.   File "/usr/lib/python2.7/dist-packages/duplicity/gpg.py", line 206, in 
__init__
.     'logger': self.logger_fp})
.   File "/usr/lib/python2.7/dist-packages/duplicity/gpginterface.py", line 
374, in run
.     create_fhs, attach_fhs)
.   File "/usr/lib/python2.7/dist-packages/duplicity/gpginterface.py", line 
402, in _attach_fork_exec
.     pipe = os.pipe()
.  OSError: [Errno 24] Too many open files