Hello mentors, Debian libpodofo package was outdated. Please update to latest version. Because Debian calibre package requires latest libpodofo. I was reported this issue before as bug report, but not respond from its maintainers. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1036938 I also make salsa merge request for this issue, you can use it for updated pacages. https://salsa.debian.org/debian/libpodofo/-/merge_requests/3 -- YOKOTA Hiroshi