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Who Knew You Could Do That with RPG IV? Modern RPG for the Modern Programmer by Paul Tuohy, Tim Rowe, Kody Robinson, Jon Paris, Jeff Minette, Susan Gantner, Jim Diephuis, Rich Diedrich

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Exception and error handling
The original version of this book briefly covered the topic of exception and error handling, mostly from the perspective of Integrated Language Environment (ILE) exception handlers. Since that time, a number of things have happened:
Interest in error handling has grown among RPG programmers, particularly with the increased use of subprocedures.
New error handling techniques were introduced into the RPG language itself though the MONITOR op-code.
For these reasons, this chapter handles the topic of exception and error ...

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