I think it's not possible to combine conversion actions with editing actions on the Inkscape command line. The documentation doesn't mix them (but it shouldn't crash, instead give a helpful message - or better, Inkscape should allow it).
Additionally, verbs require the gui: https://bugs.launchpad.net/inkscape/+bug/843260 , you cannot use -z with them.
I think it's not possible to combine conversion actions with editing actions on the Inkscape command line. The documentation doesn't mix them (but it shouldn't crash, instead give a helpful message - or better, Inkscape should allow it).
Additionally, verbs require the gui: https:/ /bugs.launchpad .net/inkscape/ +bug/843260 , you cannot use -z with them.