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[abhisun]

Can somebody pls help me with AZTS abend, what are the possbile causes of this abend?

One of the transactions in our production CICS region is regularly abending with AZTS. However the number of abends is low considering the high volume of this transaction(a vdu used by contact center to block the stolen/lost credit cards). Once in a while, this transaction abends with AZTS. After reading the Quickref(pasted below), it seems may be sometimes the contact center folks get disconnected from the network, during the transaction, and when CICS do a 'send map' it does not find the terminal and abends. However this is just my guess. When I tried to locate the abending statement in the program using the abend offset, I ended up in a 'receive map' statement. That made me more confused. The program is a simple one, just displays the information of the credit card and allows the change of status. Pls share whatever info u have on AZTS abend. Thanks!
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Explanation: An attempt to send data to a remote system failed.

System Action: The task is abnormally terminated with a CICS transaction
dump.

User Response: Investigate why the conversations with the remote system
failed. The transaction on the remote system has probably been abnormally
terminated or the session has failed.

If message 'DFHZC4930 Session unbound following read timeout.' occurred
just before the AZTS then the AZTS is caused by a timeout occurring on an
APPC session when CICS attempted to converse with the remote system.

[warp5]

Are you looking on the remote system? The user response is quite clear:
Investigate why the conversations with the remote system
failed. The transaction on the remote system has probably been abnormally
terminated or the session has failed.