z/VM: System Messages and Codes Š CP - z/VM - IBM

IOS028 IOV103
(HCPLCICS) is adhering to the interface defined in the
prologue.
IOS028
Explanation: Store-Subchannel (STSCH) simulation
for a logical device indicated a return code 12, which
correlates to a condition code 3 as defined by the XA
Architecture for the STSCH instruction. A condition code
3 indicates the subchannel is not provided in the
channel subsystem.
User Response: Look at the RDEV (pointed to by
R8), which is used by HCPIOS to manage the logical
device. The RDEV field RDEVLSOP should point to the
corresponding logical subchannel that appears to be
non-existent. Verify that STSCH simulation module for
logical devices (HCPLCIST) is adhering to the interface
defined in the prologue.
IOV001
Explanation: The simulation routine for a fully
simulated device invoked HCPIOVBK to back out of
channel program simulation. HCPIOVBK was called
after a GOTO rather than a CALL was used to invoke
HCPIOV. It is impossible to continue processing the I/O
request because there is no address available to which
to return control.
User Response: The SAVBK chain anchored in
IORSAVE indicates the environment at the time of the
failure. The CPCBK (in this SAVBK) indicates the status
of simulation for the current CCW. SAVEBPNT should
be 0, indicating an entry using HCPIOVCP.
CPCRTNAD, which addresses the simulation routine
being used, should equal VDEVSIMA. If these values
are correct, then correct the simulation routine so that it
does not call HCPIOVBK. Otherwise, try to determine
how the SAVBK or CPCBK was damaged.
IOV100
Explanation: (soft abend) A device simulation routine
returned prematurely to the virtual channel simulator.
HCPIOV recognizes this situation when the simulation
routine returns before presenting (ending) status for the
current channel command word.
User Response: The SAVBK chain anchored in
IORSAVE indicates the environment at the time of the
failure. The CPCBK (in this SAVBK) indicates the status
of simulation for the current CCW. CPCRTNAD
addresses the simulation routine being used. If the logic
of the simulation routine causes it to return prematurely,
correct it. Otherwise, try to determine how
CPCDTFLG.CPCDTEND (byte.bit) was set off
incorrectly.
54 z/VM: System Messages and Codes — CP
IOV101
Explanation: (soft abend) A device simulation routine
presented ending status more than once for a CCW.
This situation occurs in HCPIOV when the module is
reentered after previously processing ending status for
the current channel command word.
User Response: The SAVBK chain anchored in
IORSAVE indicates the environment at the time of the
failure. The CPCBK (in this SAVBK) indicates the status
of simulation for the current CCW. CPCRTNAD
addresses the simulation routine being used. If the logic
of the simulation routine causes it to present status
incorrectly, correct it. Otherwise try to determine how
CPCDTFLG.CPCDTEND (byte.bit) was set on
incorrectly.
Note: HCPIOVUS may have been entered using a
CALL to HCPIOVUC.
IOV102
Explanation: (soft abend) A device simulation routine
presented channel end more than once for a channel
command word (CCW). This situation occurs when
HCPIOV is reentered after previously processing
channel end for the current CCW.
User Response: The SAVBK chain anchored in
IORSAVE indicates the environment at the time of the
failure. CPCRTNAD addresses the simulation routine
being used. If the logic of the simulation routine causes
it to present channel end status more than once per
CCW, correct it. Otherwise, try to determine how
CPCDTFLG.CPCDTCER (byte.bit) was set on
incorrectly.
Note: HCPIOVUS may have been entered using a
CALL to HCPIOVUC.
IOV103
Explanation: (soft abend) After accepting a channel
command word (CCW), a device simulation routine
presented status without channel end. This situation
occurs when HCPIOV is reentered after previously
processing an (explicit or implied) initial status of zero
for the current CCW.
User Response: The SAVBK chain anchored in
IORSAVE indicates the environment at the time of the
failure. The CPCBK (in this SAVBK) indicates the status
of simulation for the current CCW. CPCRTNAD
addresses the simulation routine being used. If the logic
of the simulation routine causes it to present status
incorrectly, correct it. Otherwise attempt to determine
how CPCDTFLG.CPCDTBEG was set on incorrectly.
Note: HCPIOVUS may have been entered using a
CALL to HCPIOVUC. Any call to HCPIOVMV
implies an initial status of zero.