Installation

IBM® suggests that any modifications to JES2 code or the installation of JES2 exits be performed utilizing the functions of SMP/E (System Modification Program Extended). This requires the preparation of SMP/E control statements and constructs suitable for SMP/E processing. Applying changes in an SMP/E-controlled environment prevents down-leveling or the application of release incompatible maintenance.

In the case of JES2 exits, if the application of PTF maintenance changes any macros or other components used by the exits, then the affected modules will automatically be reassembled by SMP/E.

For more information about SMP/E, see SMP/E for z/OS User's Guide

Note: No exit routines are ever required as part of standard JES2 processing. The JES2 exit facility is fully optional. If you have not implemented an exit—that is, if you have not written an exit routine for it, or have not included the exit routine in a load module, or have not associated the routine with the exit at initialization time—the presence of the exit point or points that establish the exit is transparent during standard JES2 processing.