Library /sys$common/syshlp/nclhelp.hlb create, mop, client, Exception Messages  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 o  entity class not supported (OpenVMS)

    The MOP entity has not registered with EMAA.  The NET$MOP
    process has probably not been started.  For more information,
    see HELP NETWORK_MANAGEMENT MOP.

 o  already exists

    The a mop client by that instance name already exists.

 o  no such object instance

    MOP has not been properly started or configured.