Installing the standard-format exits

Installing the TSO/E standard-format exits is simpler than the installation procedures for other TSO/E exits that do not use the standard exit parameter list. All standard-format exits must have a specific name and be link-edited as separate load modules.

You can link-edit all of the standard-format exits in a separate load library that is exclusively for TSO/E exits or in an existing library that contains other routines. The standard-format exits can reside in:

The link pack area (LPA), which makes them available to all of your users. If you change the exit and want to make the changes available in LPA for all of your users, you must re-IPL your system.
Linklist (LNKLST), which makes them available to all of your users. You can also easily change the exit.
A logon STEPLIB, which is helpful for limited use and for testing the exit before you integrate it into your system. In this case, you can change the exit. However, the use of a STEPLIB is not suggested for all of your users because of the extra search time required to locate and invoke the exit.

For more information about LPA, LNKLST, and STEPLIB, see .

TSO/E determines the exact location of each exit (STEPLIB, LNKLST, or LPA). TSO/E then invokes the exit from that location and only from that location during that entire TSO/E session. If the location of the exit is changed, the change only goes into effect when a new TSO/E session is initiated. The search order is STEPLIB, LPA, and then LNKLST.

You can also install the exits using System Modification Program (SMP/E), which allows you to maintain a record of the exits you have installed. For more information about SMP/E, see the following publications:

If you use SMP/E, you must ensure that you generate your own functional module ID (FMID) that does not duplicate any of the FMIDs that IBM® uses.

The individual descriptions of each exit in this document discuss how you install TSO/E exits that do not use the standard exit parameter list.