What corrected for me was Seth's post in https://bugs.launchpad.net
/deja-dup/+bug/1606449 of:
sudo apt install duplicity
sudo apt install python-gi
Immediately works, though it appeared my system only needed to install
duplicity and python-pi was already at the newest version and did
** Tags added: yakkety
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https://bugs.launchpad.net/bugs/1641423
Title:
Back up failed with message: Failed to execute child process
"duplicity" (No such file or directory)
To manage
** Changed in: deja-dup (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1641423
Title:
Back up failed with message: Failed to execute child process
** Tags added: xenial
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https://bugs.launchpad.net/bugs/1641423
Title:
Back up failed with message: Failed to execute child process
"duplicity" (No such file or directory)
To manage
Marked downstream project as affected, because of duplicates.
** Also affects: deja-dup (Ubuntu)
Importance: Undecided
Status: New
** Changed in: deja-dup (Ubuntu)
Status: New => Confirmed
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Bugs, which is