On Mon, 14 Jan 2013 18:20:43 +0100, you wrote: I had to try too, under VAX/VMS 5.5-2: Me too! VAX/VMS V4.7 :) $ monitor ethernet MONITOR> monitor ethernet %MONITOR-E-NOCLASSES, no classes specified MONITOR> monitor blah %MONITOR-E-INVCLSNM, class-name "BLAH" is invalid or not uniquely identified Who offers more? :P G.