Wayne summarizes almost all the reasons that I prefer copylibs over includes. I, however, have used replacing quite a bit. It's very handy in cobol when you're dealing with, for example, file structures for things like current/week-to-date, month-to-date, year-to-date... where the file layouts are exactly the same. You simply reuse the same copymember substituting a different prefix. I first came across replacing in an HR system at Hughes Aircraft that used it extensively to change the prefix on various file and data set structures. * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *