I'm *guessing* that for each file, they simply FOPEN then FCLOSE with the disposition parm's bits 11:2 = 10 (Return disk space beyond EOF but don't change the FLIMIT). Donna Garverick wrote: > (yet another mpex question :-) > > hi again! > > at least for a change i'm not asking how to do something in > mpex :-) > > if i say 'altfile <somefileset>;xltrim' -- what really > happens? is mpex working directly on each file or does it > make a 'work' copy? if it's making a copy, i'm guessing > there's only one copy file in existence at a given > moment? - d > > -- > Donna Garverick Sr. System Programmer > 925-210-6631 [log in to unmask] > > Come, my friends, 'Tis not too late to seek a newer world. > Tho' much is taken, much abides; and tho' > We are not now that strength which in old days > Moved earth and heaven, that which we are, we are. > "Ulysses", A. Tennyson > > >>>>MY opinions, not Longs Drug Stores'<<< >>>> > > * To join/leave the list, search archives, change list settings, * > * etc., please visit http://raven.utc.edu/archives/hp3000-l.html * > > * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *