The output of $ mc ncp show circ ewa-0 char will tell you whether it worked: the attribute service must have the value enabled. If that is not the case check: $ mc ncp list circ ewa-0 char The service enabled value must be present and reboot the system to make it effective. You'll see decnet opcom messages only on OPA0 or on a terminal where the command $ REPLY/ENABLE was entered. Hans