z/OS DFSMStvs Administration Guide
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Example: Execute form (reentrant)

z/OS DFSMStvs Administration Guide
GC52-1388-00

In this example, the execute form of MODCB is used to modify the address of the access method control block and MACRF codes in the parameter list created by the remote-list form of MODCB in the previous example.
MODCB  ACB=MYACB,MACRF=(ADR,SEQ,OUT),MF=(E,(3))

The parameter list pointed to by register 3 is changed so that the ACB and MACRF parameter values in the execute form override those in the list form. The access method control block, MYACB, is then modified to MACRF=(ADR,SEQ,OUT).

The access method control block at ANYACB is not changed by either of these examples.

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