ATB221I

Explanation
 APPC/MVS issued a call to the ATRSUSI service,
which is a service of the system syncpoint manager (RRS).  The call
failed. When such a failure is detected during a syncpoint exchange,
the system cannot perform logical unit of work management (that is,
back out the next LUWID, or dismantle the syncpoint tree), as specified
by the LU 6.2 syncpoint architecture.
 In the message text:
 side_information
One of the following:  DRIVE BACKOUT
BREAK TREE

rsncode
The code returned by the ATRSUSI service.  Codes from this service
are documented in z/OS MVS Programming: Resource Recovery. 

System action
 APPC/MVS terminates the syncpoint processing
for the logical unit of work luwid with the conversation correlator
convcorr.

Operator response
 Notify the system programmer.

System programmer response
 Search the problem reporting data
bases for a fix for the problem. If no fix exists, contact the IBM® Support Center, and provide
the dump that was taken when the error occurred.

Programmer response
 The application program should backout
all local resources associated with the next unit of recovery and
abnormally deallocate all APPC/MVS protected conversations associated
with the next unit of recovery to cause all remote resources associated
with the local application to backout also.

Module
 ATBPCBO, ATBPCCM, ATBPCDS, ATBPCEF, ATBPCEU, ATBPCPR

Source
 APPC/MVS

Routing Code
 Hardcopy only

Descriptor Code
 4

Automation
 Trap the reason code from ATRSUSI
and translate it into text. Notify the system programmer.