IBM 3270 Manual page 252

INDSY
INDSY009
Parity check 1 in segment xxxx:
Log off and run diagnostics
Explanation: There has been a parity check on
the main system board. Segment xxxx is the
starting segment address of the 16K block of
storage containing the parity check. If xxxx
equals FFFF, the storage location where the
parity check occurred could not be found.
User Response: Try to log off the host computer
sessions. Then run the diagnostic programs to
isolate the problem.
INDSYOIO
Parity check 2 in segment xxxx:
Log off and run diagnostics
Explanation: There has been a parity check on
an expansion board. Segment xxxx is the
starting segment address of the 16K block of
storage containing the parity check. If xxxx
equals FFFF, the storage location could not be
found.
User Response: Try to log off the host computer
sessions. Then run the diagnostic programs to
isolate the problem.
INDSYOll Dumping ....
Explanation: The control program is writing
the contents of storage onto the diskette.
User Response: None.
Appendix A. Messages A-67