18A

Explanation
A PGSER macro requested a paging service (FIX,
FREE, LOAD, RELEASE, ANYWHER, PROTECT, or UNPROTECT). The request
was not valid. The caller used 31-bit addressing.
The registers
contain the following: Register 0:  A hexadecimal reason code, which is one of
the following: Code
Explanation
08000101
On a branch request, the start address is greater than the end
address.  The request was a register-format input.
0B000101
On an SVC request, the start address is greater than the end address.
 The request was a register-format input.
2A000301
Partial megabyte pagefree is prohibited against an already page
fixed large page segment.
35000201
The page is part of a virtual I/O (VIO) window.
35000301
The page had not been obtained by a GETMAIN macro.
35000B01
Partial megabyte pagefix is prohibited against an already page
fixed large page segment.
36000101
The page had not been obtained by a GETMAIN macro.
36000201
Permanent error.
3AF20101
A program check occurred when the paging services was accessing
the caller's service list (SL) entry. The entry point whose ID is
equal to the second byte of the reason code issued the reason code.
3B000401
The starting address in a virtual subarea list (VSL)/page service
list (PSL) entry is greater than the ending address.
3B000501
The caller's page service list (PSL) entry contains the reserved
flag.
3B000601
The starting address in a VSL/PSL entry is greater than the ending
address.
3BF20101
A program check occurred when the paging services was accessing
the caller's service list (SL) entry.
55000101
The caller is not in key 0.  The key for the page did not match
the caller's.
55000201
The caller requested that a permanently resident page be released.
6A000101
The caller specified a nonzero event control block (ECB) address
with a cross memory page services request.
6A000201
The caller specified a nonzero ECB address with a PGOUT, PGRLSE
or PGANY request.
6A000301
An ECB address contained a negative number.  The request was a
PGFIX, PGFREE or PGLOAD.
6A000401
An ECB was not on a word boundary.  The request was a PGFIX, PGFREE
or PGLOAD.
6A000601
The caller is not authorized to perform the page service function
requested.  The request was a PGFIX or PGFREE.
6A000701
The caller specified a cross memory mode request and a nonzero
task control block (TCB) address with a page service function to which
the TCB address was applicable.
6A000801
The caller specified an incorrect TCB.  The request was a PGFIX,
PGFREE, PGLOAD or PGOUT.
6A000901 through 6A000906
The caller specified incorrect options with the page services
request.
6A000A01
The caller did not specify a valid function in the VSL/PSL entry.
6A000B01
The caller specified an ECB address, and the page containing it
had not been obtained by a GETMAIN macro.
6A000B02
The caller specified an ECB address, and the page containing it
had not been obtained by a GETMAIN macro.
6A000C01
A caller that is not in key 0 specified an ECB address.  The key
of the page containing it did not match the caller's key.
6FF20101
A program check occurred when the paging services was accessing
the caller's service list (SL) entry.
xx0008xx
The caller tried to release a page of protected storage.
xx000907
The caller issued a PGSER macro with the PROTECT parameter, but
one of the other parameters specified was either incorrect or incompatible.
xx000908
The caller issued a PGSER macro with the UNPROTECT parameter,
but one of the other parameters specified was either incorrect or
incompatible.
xx0701xx
The caller issued a PGSER macro with the PROTECT parameter for
storage with a key that does not match the PSW key under which the
program runs. The program issuing the PGSER macro with the PROTECT
parameter must be either key zero or else run under a PSW key that
matches the key of the storage being protected.
xx0702xx
The caller tried to issue the PGSER macro with the PROTECT parameter
for virtual storage in either the PSA or any VIO window. Neither storage
area can be specified with the PROTECT keyword.
xx0704xx
The caller issued a PGSER macro with the PROTECT parameter for
virtual storage in the read/only nucleus that is backed by 1 megabyte
pages. This storage area cannot be specified with the PROTECT keyword.
xx0801xx
The caller issued a PGSER macro with the UNPROTECT parameter with
a key that does not match the PSW key under which the program runs.
The program issuing the PGSER UNPROTECT macro must be either key zero
or else run under a PSW key that matches the key of the storage being
unprotected.
xx0802xx
The caller tried to issue the PGSER macro with the UNPROTECT parameter
for virtual storage in either the PSA or any VIO window. Neither storage
area can be specified with the UNPROTECT keyword.
xx0804xx
The caller issued a PGSER macro with the UNPROTECT parameter for
virtual storage in the read/only nucleus that is backed by 1 megabyte
pages. This storage area cannot be specified with the UNPROTECT keyword.

Register 3: If branch entry, caller's return address.
Register 4: If LIST-FORMAT entry, address of the caller's
erroneous page service list entry (PSL)/short page service list (SSL).
If REGISTER-FORMAT entry, register 4 contains zero.
Registers 5-7:  If SSL format entry, registers 5-7 contain
the caller's input registers. If PSL format SVC entry, registers
5-7 contain zero.
 If PSL format branch entry, registers 5-7
are irrelevant.

Register 8:  If SSL format entry, register 8 is the same
as the caller's input register. If PSL format SVC entry, register
8 contains zero.
 If PSL format branch entry, register 8 contains
the caller's input TCB address, or, if no TCB address was supplied,
register 8 contains zero.

Register 9:  If PSL format entry, address of the input
ECB. If no ECB address was supplied, register 9 contains zero. If
SSL format entry, register 9 is the same as the caller's input register.

Register 10:  If the error is related to paging, the address
of the page in error. If the error is not related to paging, register
10 contains zero.
Register 11:  If LIST-FORMAT entry, address of the caller's
first PSL/SSL entry. If REGISTER-FORMAT entry, register 11 contains
0.
Registers 12-14: If PSL format entry, the PSL entry in
error. If the PSL was in pageable storage or if the PSL storage key
did not match a nonzero caller's storage key, registers 12-14 contain
zero. If SSL format entry, register 12 contains zero. Registers
13-14 contain the SSL entry in error, or, if the SSL was in pageable
storage, registers 13-14 contain zero.

Register 15: Hexadecimal reason code, as follows: Code
Explanation
04
A caller issued a PGFIX request but did not obtain the PSL storage
using a GETMAIN macro, or a page release operation failed because
either the caller attempted to release permanently backed storage
or a non-system key caller attempted to release storage in a different
key.
10
The input ECB, TCB, or PSL/SSL failed validity checks.

System action
The system issues an abend to the current task.

System programmer response
  Correct the problem in the request
and run the job again. If PGFIX or PGFREE was requested and the caller
was not authorized, obtain proper authorization and run the job again.

Source
Real storage manager (RSM)