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 pro­
gram. Whenever a program abnormally terminates, a message is issued.
Figure 60 lists the possible abend messages and identifies the type of abend for
these messages.
Message
(Alarm rings) DMKDMP908I SYSTEM FAILURE CODE xxxxxx DMKCKP900W SYSTEM RECOVERY FAILURE; PROGRAM CHECK DMKCKP901W SYSTEM RECOVERY FAILURE; MACHINE CHECK, RUN SEREP DMKCKP902W SYSTEM RECOVERY FAILURE; FATAL I/O ERROR - NUCL AREA
- WARM AREA
DMKCKP922W SYSTEM RECOVERY FAILURE; INVALID SPOOLING DATA DMKCKP910W SYSTEM RECOVERY FAILURE; INVALID WARM START CYLINDER
DMKCKP911W SYSTEM RECOVERY FAILURE; WARM START AREA FULL DMKCKT903W SYSTEM RECOVERY FAILURE; VOLID xxxxxx ALLOCATION ERROR CYLINDER xxx
DMKCKT912W SYSTEM RECOVERY FAILURE; VOLID xxxxxx NOT MOUNTED DMKCKV912W SYSTEM RECOVERY FAILURE; VOLID xxxxxx NOT MOUNTED DMKCKS915E PERMANENT I/O ERROR ON CHECKPOINT AREA
DMKCKT916E ERROR ALLOCATING SPOOL FILE BUFFERS DMKCKV916E ERROR ALLOCATING SPOOL FILE BUFFERS DMKCKV917E CHECKPOINT AREA INVALID;
CLEAR STORAGE AND COLD START DMKWRM921W SYSTEM RECOVERY FAILURE; UNRECOVERABLE I/O ERROR DMKWRM903W SYSTEM RECOVERY FAILURE; VOLID xxxxxx ALLOCATION ERROR CYLINDER xxx OR PAGE xxx xxx
DMKWRM904W SYSTEM RECOVERY FAILURE; INVALID WARM START DATA
DMKWRM912W SYSTEM RECOVERY FAILURE; VOLID xxxxxx NOT MOUNTED DMKWRM920W NO WARM START DATA; CKPT START FOR RETRY
Figure 60 (Part 1 of 3). Abend Messages
Type of Abend
CP abend, system dumps to disk. Restart is
automatic.
If the checkpoint program encounters a pro­
gram check, a machine check, a fatal I/O error, or an error relating to a certain warm
start area 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 PSW. If the warm start program encounters a
severe error, a message is issued indicating
the error and CP enters the wait state with
code 009 in the PSW. Introduction to Debugging 467

Message
DMKDMP908I SYSTEM FAILURE, CODE xxxxxx
DMKCKP960I SYSTEM WARM START DATA SAVED DMKCKP961W SYSTEM SHUTDOWN COMPLETE Optional Messages:
DMKDMP905W SYSTEM DUMP FAILURE; PROGRAM CHECK
DMKDMP906W SYSTEM DUMP FAILURE; MACHINE CHECK, RUN SEREP DMKDMP907W SYSTEM DUMP FAILURE; FATAL I/O ERROR DMKMCH610W MACHINE CHECK SUPERVISOR DAMAGE
DMKMCT610W MACHINE CHECK SUPERVISOR DAMAGE
DMKMCH611W MACHINE CHECK SYSTEM INTEGRITY LOST DMKMCT611W MACHINE CHECK SYSTEM INTEGRITY LOST Figure 60 (Part 2 of 3). Abend Messages
468 VM/SP System Programmer's Guide
Type of Abend CP abend, system dumps to tape or printer.
The system stops; the operator must IPL the
system to start again.
If the dump program encounters a program
check, a machine check, or a 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 disabled wait state with
code 004 in the PSW. CP termination with wait state.
The machine check handler encountered an
unrecoverable error with the VM/SP control
program.
The machine check handler encountered an
error that cannot be diagnosed; system integ­
rity, at this point, is not reliable.