IBM 3270 Manual page 220

INDPA
INDPA004 Current - system level
=
(xxxx)
But patch prerequisite is -
system level
=
(xxxx)
Explanation: The first entry in the patch file
specified a prerequisite AP AR level of
xxxx,
but
the system is currently at a system level of
xxxx.
User Response: Either upgrade the system level
or correct the patch file, whichever caused the
failure.
INDPA005 Requested APAR
(xxxxxxx)
already installed
Explanation: The APAR number specified is
already installed on the system.
User Response: Verify that you typed in the
correct APAR number. If you did, then the patch
is already installed and no further action is
needed. If you typed an incorrect APAR number,
correct and retry.
INDPA006 Requested APAR
(xxxxxxx)
not
installed
Explanation: You have tried to remove an
AP AR that is not on the system, or you entered
the wrong APAR number.
User Response: If you typed the number
correctly, the AP AR has been removed, and no
further action is needed.
Appendix A. Messages A-35