All DADSM functions (create, extend, scratch, partial release, and rename) call a common pre-processing dynamic exit routine (IGGPRE00_EXIT) and a common post-processing exit routine (IGGPOST0_EXIT). The system adds the IGGPRE00 and IGGPOST0 modules as exit routines to their associated dynamic exits. These two modules are equivalent to what was provided in releases prior to z/OS V1R13. DADSM functions will call each dynamic exit using dynamic exit services (CSVDYNEX) during pre- and post-processing so that each added exit routine to IGGPRE00_EXIT and IGGPOST0_EXIT is called, allowing the exit routine to gain control before and after DADSM processing.