There’s a world of difference between old RPG and modern RPG. For one thing, if your code is written in RPG III or an earlier version, almost no one except for veteran RPG programmers can make much sense of it. And because all modern codes are modular, the old stuff doesn’t mix well with the new. That, in a nut shell, is why ARCAD Software, in conjunction with IBM Rational, created its RPG converter tool for migrating legacy RPG to free form RPG.