Use the activate request of the IEFSSI macro to activate your subsystem.

The subsystem usually issues the activate request at initialization to activate the subsystem, since the subsystem handles building the vector table. However, the system operator can use also use the SETSSI ACTIVATE command, if the subsystem enabled the SETSSI ACTIVATE command. See z/OS MVS System Commands for more information on the SETSSI ACTIVATE command and Defining Subsystem Options for more information on using the IEFSSI options service to determine the subsystem's response to the SETSSI command.

Inputs

The activate request provides for the specification of an input token that represents the SSVT to be used to activate the subsystem. This is the token returned to the caller of the create request when the SSVT is built.

The SETSSI ACTIVATE command does not accept a corresponding input, because the system operator cannot manipulate vector tables and does not have access to the tokens.