Rational Open Access: RPG Edition (RPG OA) is one of the new features of RPG that can help with modernization efforts. With RPG OA, you can redirect RPG’s I/O operations from the standard IBM i I/O routines to “handler” code that you develop. Let's start with an RPG program that's easy to understand at a glance. The code in program IFS01 (Figure 1) reads from a disk file and prints each record to the printer. Figure 1: The IFS01 program is the baseline example ...

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