Connecting and disconnecting subsystems

Before an IMS subsystem can access external subsystems (another program executing in an z/OS® address space) such as DB2®, you must connect the IMS subsystem to this other subsystem. IMS can connect to another subsystem only if that subsystem is identified in the subsystem member in IMS.PROCLIB.

Specify the subsystem member name in the SSM EXEC parameter. When specified to and accessed by IMS, the subsystem member name cannot be changed without stopping IMS.

Related reading: For information on the SSM EXEC parameter, see IMS Version 15.2 System Definition. For more information about connecting IMS to another subsystem, see IMS Version 15.2 Operations and Automation.