Thank you very much, your solution worked (actually I had to give virsh -c xen:/// undefine trim-fedora-23 and not virsh -c xen:/// undefine fedora-23-fstrim and then I had to manually remove the trim-fedora-23 files in /var/lib/qubes/appvm).
The problem started when I decided to make a little script to automatize the trim process for all my templates at once, but it is evident that I must have made some mistake while doing it :D Anyway, a "global trim function", as well as a "global update function" would be very helpful, updating/trimming of templates can be quite time consuming! Cheers, Fab. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/53fffefd-49a7-4422-82d1-1e2eacc144a2%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.