TWA can be requested via PCT. TWA is mainly used by macro level program became the working storage is not duplicated for each task using the same macro level program. In marco level program, the working storage is assumed to be read only.
(his is different from command line program which using EIP and the working storage is automated allocated separately for each transaction using the same program. Therefore, command level program seldom uses TWA.
TWA is deleted when the transaction ends. The issue for using TWA is that it is allocated behind UTCA in control block area. Storage violation would likely affects CICS availability.
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