My thanks to Bob McGregor who seems to have the magic answer.  There is a
program called NETTOOL.NET.SYS which will list the contents of NMMGR's Node-
name to IP-Address directory.  And you can redirect the STDIN and STDLIST
of NETTOOL to disc files, making it possible to include it in a UDC, which
is just what I needed. Thanks Bob.