Check whether messages are present under the PMDF message queue
directory, /pmdf/queue/. Shell commands such as
ls or the pmdf qm -maint utility's
directory command may be used to check for the presence of
expected message files under the PMDF message queue directory.
If the pmdf test -rewrite output looks correct, check that
messages are actually being placed in the PMDF message queue
subdirectories. If not, you may have a problem with file space on that
disk.