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SSID parameter

The required SSID parameter (required for the CAS startup procedure, but optional for the START command) identifies the CAS subsystem ID to the UAS and PAS.

This parameter uses the following syntax:


If an SSID is not specified on the START command, the SSID on the PROC statement in the CAS startup procedure is used. The default is BBCS.

Be sure that your MainView users know the SSID value, because this value is required for the Subsystem ID field in the Session Control Parameters panel.


For a PAS to connect to a CAS, the SSID value in the CAS startup procedure must be the same as:

  • The CASID parameter in the BBISSPxx member of BBPARM

  • The SSID parameter in the z/OS PAS startup procedure

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