I'm also seeing this issue and I just purged Duplicity and then added it back with the PPA and I am still seeing the issue. I am using 0.7.17 now. What information can I provide to help fix this?
Ubuntu Version: UbuntuMate 17.10 uname -a Linux 4.13.0-36-generic #40-Ubuntu SMP Fri Feb 16 20:07:48 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux ulimit -v unlimited ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 31429 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 31429 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1727653 Title: error: can't start new thread To manage notifications about this bug go to: https://bugs.launchpad.net/duplicity/+bug/1727653/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs