DOES A PROBLEM EXIST? There are four types of problems:
1. Loop
2. Wait state
3. Abend (abnormal end)
4. Incorrect results
The most obvious indication of a problem is the abnormal termination
of a program. Whenever a program abnormally terminates, a message is
issued. Figure 1 lists the possible abend messages and identifies the
type of abend for these messages.
Message
(Alarm rings) DMKDMP9081 SYSTEM FAILURE CODE xxxxxx DMKDMP905W SYSTEM DUMP FAILURE; PROGRAM CHECK DMKDMP906W SYSTEM FAILURE; MACHINE CHECK, RUN SEREP DMKDMP907W SYSTEM DUMP FAILURE; FATAL I/O ERROR DMKCKP900W SYSTEM RECOVERY FAILURE; PROGRAM CHECK DMKCKP901W SYSTEM RECOVERY FAILURE; MACHINE CHECK, RUN SEREP DMKCKP902W SYSTEM RECOVERY FAILURE; FATAL I/O ERROR - NUCL CYL - WARM CYL DMKCKP922W SYSTEM RECOVERY FAILURE; INVALID SPOOLING DATA DMKCKP910W SYSTEM RECOVERY FAILURE; INVALID WARM START CYLINDER DMKCKP911W SYSTEM RECOVERY FAILURE; WARM START AREA FULL DMKCKS903W SYSTEM RECOVERY FAILURE; VOLID xxxxxx ALLOCATION ERROR CYLINDER xxx DMKCKS912W SYSTEM RECOVERY FAILURE; VOLID xxxxxx NOT MOUNTED DMKCKS915E PERMANENT I/O ERROR ON CHECKPOINT CYLINDER DMKCKS916E ERROR ALLOCATING SPOOL FILE BUFFERS DMKCKS917E CHECKPOINT CYLINDER INVALID; CLEAR STORAGE AND COLD START Figure 1. Abend Messages (Part 1 of 3)
Type of Abend CP abend, system dumps to
disk. Restart is automatic.
If the dump program encoun­
ters a program check, ma­
chine check, or fatal I/O error, a message is issued
indicating the error. CP enters the wait state with
code 003 in the PSW. If the checkpcint program
encounters a program check,
a machine check, a fatal I/O error, or an error relating
to a certain warm start
cylinder or warm start data
conditions, a message is
issued indicating the error
and CP enters the wait state
with code 007 in the PSW. If the checkpoint start
program encounters a severe
error, a message is issued
indicating the error and CP enters the wait state with
code OOE in the PSi.
r Message DMKWRM921i SYSTEM RECOVERY FAILURE; UNRECOVERABLE I/O ERROR DMKWRM903W SYSTEM RECOVERY FAILURE; VOLID xxxxxx ALLOCATION ERROR CYLINDER xxx DMKWRM90QW SYSTEM RECOVERY FAILURE; INVALID WARM START DATA DMKWRM912W SYSTEM RECOVERY FAILURE; VOLID xxxxxx NOT MOUNTED DMKWRM920W NO WARM START DATA; CKPT START FOR RETRY DMKDMP90BI SYSTEM FAILURE, CODE xxxxxx DMKCKP9601 SYSTEM WARM START DATA SAVED DMKCKP961W SYSTEM SHUTDOWN COMPLETE DMKDMP905W SYSTEM DUMP FAILURE; PROGRAM CH ECK DMKDMP906W SYSTEM DUMP FAILURE; MACHINE CHECK, RUN SEREP DMKDMP907W SYSTEM DUMP FAILURE; FATAL 1/0 ERROR DMKMCH610W MACHINE CHECK SUPERVISOR DAMAGE DMKMCT610W MACHINE CHECK SUPERVISOR DAMAGE DMKMCH611W MACHINE CHECK SYSTEM INTEGRITY LOST April 1, 1981
Type of Abend I ----I IIf the warm start program I t encOtlnteFsa severa error, a I I message is issued indicating, i the error and CP enters the I wait state with code 009 , in the PSi. I I I I I CP abend, system dumps to
tape or printer. The system
stops; the operator must 1Pt the system to start again.
If the dump program encoun­
ters a program check, a ma­
chine check, or fatal I/O error, a message is issued
indicating the error. CP enters the wait state with
code 003 in the PSW. If the dump cannot find a
defined dump device and if
no printer is defined for
the dump, CP enters a dis­
abled wait state with code 004 in the PSi. CP termination with wait
state.
The machine check handler en­
countered an unrecoverable
error with the VM/370 con­
trol program ..
The machine check handler en­
countered an error that
cannot be diagnosed; system
integrity, at this point,
is not reliable. Part 1. Debugging with VM/370 5
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