Hi, The Rudel version 0.3.1 on elpa is giving error on my emacs on rudel-host-session. Specifically, the (cl-defmethod no-applicable-method …) in rudel-transport-util.el is obsolete and replacing it with (cl-defmethod cl-no-applicable-method …) fixed it. I checked http://git.savannah.gnu.org/cgit/emacs/elpa.git/tree/rudel-transport-util.el?h=externals/rudel and notice that the bug is fixed there, and there’s plenty of development unsynced to ELPA. Maybe get them to ELPA? At least the bug fix. Best, Qiantan