f IProble. I Type Where Abend Occurs Distinguishing Characteristics IWait I I I I I Disabled CP wait The processor wait light is Also,
pressing the REQUEST key on the operator's
console, or the equivalent action, leaves
the REQUEST PENDING light If the
message DKKKCH610W KACHINE CHECK SUPERVISOR DAKAGE DMKMCT610W KACHINE CHECK SUPERVISOR DAMAGE DKKKCH611W KACHINE CHECK SYSTEK INTEGRITY LOST DKKMCH612W MACHINE CHECK; TIMING FACILITIES DAMAGE; RUN SEREP DKKKCH612W MACHINE CHECK; TIMING FACILITIES DAKAGE; RUN SEREP appears on the processor console, a machine
check (probable hardware error) caused the CP disabled wait state. If the message DKKCCH603W CHANNEL ERROR, RUN SEREP, RESTART SYSTEM appears on the processor console, a channel
check (probable hardware error) caused the CP disabled wait If the message DMKCPI955W INSUFFICIENT STORAGE FOR VK/370 appears on the processor console, the
control program has entered a disabled wait
state with code OOD in the PSi. Either the
generated system is larger than the real
machine size, or a hardware machine mal­
function prevents VK/370 from using the
necessary amount of storage. If the message DMKPAG415E CONTINUOUS PAGING ERRORS FROK DASD xxx
appears on the processor console, the
control program (CP) has entered a disabled
wait state with code OOF in the PSW. Consecutive hardware errors are occurring
on one or more VK/370 paging devices.
If the system is being controlled at an
alternate console, messages DMKCKP910I, DMKCKP911W, and DMKCKP960I are not
generated before the system goes into a
wait state. figure 2. VK/370 Problem Types (Part 4 of 6) Part 1. Debugging with VK/370 11

r IProblem I Type Where Abend Occurs Distinguishing Characteristics
1------------------------------------------------------------------ Wait (cont.) , Enabled CP IThe processor console light is on, but the
wait I system accepts interrupts from I/O devices.
Disabled
virtual
machine wait
Enabled
virtual
machine wait
Disabled RSCS wait IThe VM/370 Control program does not allow a
virtual machine to enter a disabled wait
state or certain program loops. Instead, CP issues one of the following messages: DMKDSP450W CP ENTERED; DISABLED WAIT PSW DMKDSP451W CP ENTERED; INVALID PSW DMKDSP452W CP ENTERED; EXTERNAL INTERRUPT LOOP DMKDSP453W CP ENTERED; PROGRAM INTERRUPT LOOP A PSW enabled for I/O interrupts is loaded.
Nothing happens if an I/O device fails to
issue an I/O If a program is
taking longer to execute than expected,
periodically issue the CP QUERY TIME. If the processing time remains un­
changed, there is probably a virtual
machine enabled wait. CMS types a blip character fer every 2
seconds of elapsed processing time. If the
program does not end and blip characters
stop typing, an enabled wait state probably The RSCS operator is notified of the wait
state by CP issuing the message DMKDSP450W CP ENTERED; DISABLED WAIT PSW If, in addition, the .essage DMTINI402T IPL DEVICE READ I/O ERROR appears on the RSCS console, an unrecover­
able error has occurred while reading the RSCS nucleus fro. DASD storage. RSCS enters a disabled wait state with a code
of 011 in the PSW. If a program check occurs before the
program check handler is activated, RSCS enters a disabled wait state with a code of 007 in the PSW. Figure 2. VM/370 Problem Types (Part 5 of 6) 12 IBM 9h/37G System programmer·s Guide
,