COMPATIBLE is an almost mystic parameter. It has a default setting for each release. But if you try to find more information what it really does, you won’t be very happy. And in reply to my previous blog post about whether you need to change COMPATIBLE when you apply an RU, I received the following question: When and how should you change
What does COMPATIBLE do?
To find an answer to this question, I consulted the documentation at first. And I found this:
COMPATIBLEensures that new features do not write data formats or structures