...
> However, a !LISTF [log in to unmask],9 immediately prior to the !STORE
> showed no accessors for any files. Could there be accessors of the
> files that !LISTF,9 doesn't show?

Yes.  Any process that sm_open's the file (that is, opens the
file but by-passes the file system by directly calling privileged,
lower level OS procedures) and does *not* lock one of three
semaphores cannot be detected by LISTF,8 (or 9).  The three
semaphores are: the file open semaphore, the FLOCK semaphore
or the GUFD semaphore.  This is not common, but does occur
in some 3rd party products.  There is a communicator article
on Jazz at:

http://jazz.external.hp.com/papers/Communicator/5.5/exp3/ci_enhancements.htm
l#LISTF
(line wrap)

with more info on LISTF and accessors.

regards,
 Jeff Vance, CSY

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