ARC0900I

Explanation
 A DFSMShsm error occurred. The module modname detected
an error of the type indicated in the message text. The internal DFSMShsm error
code is retcode. If the ESTAE exit processed the
error, 900 (decimal) was added to the error code to identify that
the ESTAE exit was invoked.
 If TYPE is SNAP FAILED, retcode indicates
the internal return code from the SNAP macro. However, when retcode is
0, the SNAP data set could not be opened. A SNAP failure always causes
an abnormal end (abend) to occur.
 If retcode is
9nn, an abend occurred after the return code was
set to nn. If nn is nonzero,
the explanation for nn depends on what function DFSMShsm was
running.  Function
Explanation of Abend
Recovery/Recall
ARC11nn
Space Management
ARC12nn
Backup
ARC13nn

 For example, if you receive a return code of
931 and you were running RECOVERY, message ARC1131I explains the return
code that was set before the abend occurred.
 If
the retcode is not 9nn, see
"Table 1 Entries that pass error codes
to ARCERP" in z/OS DFSMShsm Diagnosis for
the explanation.

System action
 DFSMShsm ends only if the option is FATAL.
Otherwise, DFSMShsm performs
the option indicated in the message and continues processing. If the
option is ABEND, DFSMShsm reinstates
the terminating task after the dump.

Programmer response
 Investigate the error using the dump. Restart DFSMShsm if
necessary. The system programmer can set a trap in the module for
the particular DFSMShsm error
code to examine system status the next time the error occurs.

Source
 DFSMShsm