An IPCSPRnn member contains parameters used during an IPCS session. These session parameters allow an installation to tailor IPCS sessions to its particular requirements. The parameters define the names of various data sets and default values to be used throughout that IPCS session. When you execute the IPCS command, IPCS initialization processes these parameters. Thus, you cannot modify or respecify them during an IPCS session.
The installation can have several IPCSPRnn members. You then specify the member that suits your needs for a particular IPCS session. See BLSCECT (formatting exits for dump and trace analysis) for information about IPCS parmlib member allocation.