Rational Developer for System z
Enterprise PL/I for z/OS, Version 3.8, Programming Guide

Modifying the PL/I cataloged procedures

EXEC statement
DD statement

You can modify a cataloged procedure temporarily by including parameters in the EXEC statement that invokes the cataloged procedure, or by placing additional DD statements after the EXEC statement. Temporary modifications apply only for the duration of the job step in which the procedure is invoked. They do not affect the master copy of the cataloged procedure in the procedure library.

Temporary modifications can apply to EXEC or DD statements in a cataloged procedure. To change a parameter of an EXEC statement, you must include a corresponding parameter in the EXEC statement that invokes the cataloged procedure. To change one or more parameters of a DD statement, you must include a corresponding DD statement after the EXEC statement that invokes the cataloged procedure. Although you cannot add a new EXEC statement to a cataloged procedure, you can always include additional DD statements.


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