Library /sys$common/syshlp/nclhelp.hlb enable, x25_server, client, Exception Messages  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 o  filter in use

    One or more of the specified filters is already being used by
    another client.

 o  insufficient information

    Before enabling the client you must ensure that the following
    characteristics have been given values of: application, filters,
    nodes.

 o  filter in error

    One or more of the specified filters does not exist, or is in
    use.