Implementing User Programs › Write a SUBSYS Program

Write a SUBSYS Program

A SUBSYS program has to be able to handle the following events:

• An NCL process that called the subsystem terminates.
• An initialization call is made.
• A SUBSYS STOP command is executed.
• Your product starts to shut down.
• A subsystem cleanup is performed.

To make it easy to track data associated with a given environment (such as an NCL procedure), various correlator words are provided from which you can anchor control block structures.

The following sections describe how to write a SUBSYS program using the new parameter format list.

Note: For more information about how to write a program using the old parameter list, see the &CALL description in the Network Control Language Reference Guide.