Certain classes of CICS® storage that are normally freed during the processing of a transaction can, optionally, be kept intact and freed only at the end of the transaction. Then, in the event of an abend, the dump contains a record of the storage that would otherwise have been lost, including the storage used by CICS service modules. The classes of storage that can be frozen in this way are those in the teleprocessing and task subpools, and in terminal-related storage (TIOAs).
The storage freeze function is invoked by the CSFE transaction. For information about using CSFE, see CICS Supplied Transactions.