Oh, maybe I have the explanation now: no free space on /tmp. I tried running the same command again with -v9, and I got this:
Using temporary directory /tmp/duplicity-_USM1S-tempdir
Registering (mkstemp) temporary file /tmp/duplicity-_USM1S-tempdir/mkstemp-QdJYxb-1
Temp space has 25976832 available, backup needs approx 34078720.
Removing still remembered temporary file /tmp/duplicity-_USM1S-tempdir/mkstemp-QdJYxb-1
Oh, maybe I have the explanation now: no free space on /tmp. I tried running the same command again with -v9, and I got this: _USM1S- tempdir _USM1S- tempdir/ mkstemp- QdJYxb- 1 _USM1S- tempdir/ mkstemp- QdJYxb- 1
Using temporary directory /tmp/duplicity-
Registering (mkstemp) temporary file /tmp/duplicity-
Temp space has 25976832 available, backup needs approx 34078720.
Removing still remembered temporary file /tmp/duplicity-