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

 o  address prefix not unique

    A reachable address already exists with the specified address
    prefix.

 o  invalid address prefix

    Specified address prefix has more than two digits, and does not
    correspond to a valid AFI.

 o  non DA circuit

    A reachable address on an endnode can only be created on a DA
    circuit.