Coding the IEFSSNaa MVS subsystem initialization member

If you want to use the console message handling facility or to change the number of pipes that can be allocated in an EXCI address space, code the entry by using one of the following methods:

CICS,DFHSSIN,DFHSSIyy

or

SUBSYS SUBNAME(CICS)
  INITRTN(DFHSSIN)
  INITPARM(DFHSSIyy)

This entry is used for every CICS region that runs under MVS that you have IPLed with this version of the IEFSSN member. You do not have to specify both DFHSSIN and DFHSSIyy, however apart from the suffix yy, you must code the entry for each parameter using the exact format given in the example. The terms have the following meanings:

CICS

The name of the CICS subsystem.

DFHSSIN

The name of the CICS subsystem routine that initializes the console message-handling facilities and the number of pipes that can be allocated in an EXCI address space. If you omit this name, CICS is defined as an MVS subsystem, but none of the console message-handling facilities are enabled, and the default number of pipes that can be allocated in an EXCI address space is used. That default is 100.

DFHSSIyy

The name of a SYS1.PARMLIB member in which you have defined initialization parameters for message formatting and EXCI pipe allocation for the CICS subsystem. If you specify DFHSSIN but omit DFHSSIyy, the DFHSSIN routine tries to use the parameters that are defined in member DFHSSI00.

If the DFHSSI00 member does not exist, the routine uses the default values:

• For message formatting the default values are defined in the DFHSSIN member. They are described in Default message-formatting initialization parameters.
• For EXCI pipe allocation, the fixed value is 100.