033

Explanation
The error occurred during processing of an OPEN
macro instruction for an indexed sequential data set.  If the error
occurred during the processing of an indexed sequential access method
(ISAM) OPEN executor, register 15 contains a hexadecimal reason code: Code
Explanation
01
An I/O error occurred while reading the highest level index.
02
An I/O error occurred while searching for the end-of-file mark
following the last data record in the prime area. The DCBLPDA field
of the data control block (DCB) contains the address of the last record
in the prime area.
03
An I/O error occurred while searching for the end-of-file mark
following the last data record in the independent overflow area. The
DCBLIOV field of the data control block (DCB) contains the address
of the last record in the independent overflow area.
04
The DCBMSHIA field of the data control block (DCB) contained an
address that either specified a location outside the boundaries of
the virtual storage assigned to the task or had a storage protection
key other than that specified in the task control block (TCB).
05
An I/O error occurred while reading the last prime data block
during open processing for resume load.
•
All volumes of a multivolume ISAM data set were not mounted.

System programmer response
If the error recurs and the program
is not in error, look at the messages in the job log for more information.
Search problem reporting data bases for a fix for the problem. If
no fix exists, contact the IBM® Support
Center. Provide the JCL and the program listing for the job.

Programmer response
Verify that the DCBLPDA, DCBLIOV, and DCBMSHIA
fields were not incorrectly specified or modified by the problem program.
 At the time of the abnormal end, register 4 contains the address
of the DCB.  After making corrections, reassemble the program and
run the job step again.

Source
DFSMSdfp