Responsibilities of the user program

Before invoking the DFHCSDUP program, your calling program must ensure that:

• AMODE(24) and RMODE(24) are in force
• S/370 register conventions are obeyed
• If the EXITS parameter is passed, any programming environment needed by the exit routines has been initialized
• Any ACBs or DCBs passed for use by the DFHCSDUP program are OPEN.