After you have written a command processor to be invoked under TEST, or a subcommand of TEST, you must define it as such to the TEST command.

To define installation-written subcommands and command processors to TEST, you can use the CSECT IKJEGSCU or member IKJTSOxx of SYS1.PARMLIB. With IKJTSOxx, you avoid having to update, reassemble and link-edit the CSECT, and you can update or list the subcommands and command processors dynamically using the PARMLIB command.

The following topics describe how to use IKJTSOxx or CSECT IKJEGSCU.