235

Explanation
An error occurred during processing associated
with SVC 53, which obtains and releases exclusive control of a resource
associated with a BDAM data set.  The task recovery routine for this
SVC determined that a control block required as input to SVC 53 was
not in the user's region and/or key.  This system completion code
is accompanied by message IEC902I. Refer to the explanation of message
IEC902I for complete information about the task that was ended and
for an explanation of the return code in register 15.

System action
Message IEC902I is issued, specifying a cleanup
code that indicates the results of the cleanup of resources attempted
by the recovery routine.

Programmer response
Insure the validity of the control block
from which the address of the block in error was taken.  For example,
make sure that the input specified in the RELEX macro, the BLKREF
address, is valid and in the correct format and that the DCB address
passed is valid.  If a RELEX macro was not issued, make sure that
the IOB related to the exclusive control request is correct and contains
the correct DECB address (IOBECBPT) and DCB address (IOBDCBPT).
In
addition, check the DCBEBAD field in the DCB to ensure that it contains
the correct DEB address, and that the DEB (DEBDCBAD) points back to
this DCB.  If the next IOB is found to be in error, find the entry
in the read exclusive list associated with the requested block and
ensure that the RDXIOBUQ field is correct.

Source
DFSMSdfp