088

Explanation
During initial program load (IPL), the system encountered
an error in processing the LOADxx or NUCLSTxx members
of SYS1.PARMLIB.
The following format shows the location of
the reason code in  bits 36 through 43 of the PSW: X'000A0000 8rrxxwww'
  000A0000
The A is bits 12 through 15 (the CMWP bits).
8
If bits 33-39 are not zero then bit 32 must be on  indicating
AMODE (31-bit addressing mode).
rr
A hexadecimal reason code indicating the reason for the failure.
xx
Irrelevant information.
www
The wait state code.

 The reason code (rr) is one of
the following: 00
IPL could not find the LOADxx member in SYSn.IPLPARM
on the IODF volume or SYS1.PARMLIB on the IODF volume or on SYSRES.
Either the system programmer did not create the member or the operator
typed the wrong value for the LOAD parameter.Note: Make sure the parmlib
is a PDS and not a PDSE.

02
The system could not find the NUCLSTxx member
of SYSn.IPLPARM or SYS1.PARMLIB that was specified on the NUCLST statement
in the LOADxx SYS1.PARMLIB member.
04
The SYSn.IPLPARM or SYS1.PARMLIB directory entry for the LOADxx member
contains incorrect information. IPL cannot read the LOADxx member.
06
The SYSn.IPLPARM or SYS1.PARMLIB directory entry for the NUCLSTxx member
contains incorrect information, and IPL cannot read it.
08
While reading the LOADxx member, IPL reached
the end-of-file where there should have been more data. The contents
of the LOADxx member are incorrect.
0A
While reading the NUCLSTxx member, IPL reached
the end-of-file where there should have been more data. The contents
of the NUCLSTxx member are incorrect.
0C
The member of SYS1.NUCLEUS selected was excluded by a NUCLSTxx EXCLUDE
statement. There was no alternate IEANUC0x member of SYS1.NUCLEUS
included.
0E
Could not locate nucleus extension IEANUC1x or IEANUC2x.
10
z/Architecture® mode
was requested on the ARCHLVL parameter in the LOADxx parmlib member,
but the processor does not support z/Architecture mode.
14
You attempted to IPL a level of z/OS® that
requires z/Architecture,
but the machine does not support z/Architecture.
80
An MVSCP statement was found in the LOADxx member that was used
to IPL.

System action
The system enters a non-restartable wait state.

Operator response
For reason codes X'04', X'08' or X'80' notify
the system programmer.
For reason code X'00', check
the value specified in the LOAD parameter. If it is incorrect, use
the correct value and reIPL. If it is correct, notify the system programmer
that the LOADxx member is missing from SYSn.IPLPARM
on the IODF volume or SYS1.PARMLIB on the IODF volume or on SYSRES.

System programmer response
Do one of the following: For reason code X'00', create the LOADxx member
of SYSn.IPLPARM on the IODF volume or SYS1.PARMLIB on the IODF volume
or on SYSRES. Tell the operator what value to use for the LOAD parameter.
For reason code X'02' make sure that the NUCLST statement
was specified correctly in the LOADxx member of
SYSn.IPLPARM or SYS1.PARMLIB. Make sure also that the NUCLSTxx parmlib
member resides in the same data set as the LOADxx parmlib
member.
For reason code X'06' or X'0A', delete the NUCLSTxx member
of SYS1.PARMLIB. Then either recreate the NUCLSTxx member,
or create a different one. Tell the operator what value to use for
the LOAD parameter.
For reason code X'04' and X'08' delete the LOADxx member.
Then either recreate the LOADxx member, or create
a different one. Tell the operator what value to use for the LOAD
parameter.
For reason code X'0C', correct the NUCLSTxx member
so that it does not exclude IEANUC0x.
For reason code X'0E', if IPLing with ARCHLVL 1 specified
in LOADxx, create nucleus extension IEANUC1x, or if by IPLing with
ARCHLVL 2, create nucleus extension IEANUC2x.
For reason code X'10', do not specify ARCHLVL 2 in LOADxx.
For reason code X'14', IPL this z/OS release only on a machine that supports z/Architecture.
For reason code X'80', remove the MVSCP statement from
the LOADxx member used to IPL. An IODF must be used to specify I/O
configuration data. See z/OS HCD User's Guide 
for information about IODF.

Source
Initial program load (IPL)