I'm getting into the "MVC pattern" experience of RPG programming, thanks to Scott Klement's hints (see "A pattern for reusable code" on his site http://www.scottklement.com and "Binder Language and the Signature Debate" at http://systeminetwork.com/print/64029).
After some initial difficulties, I have made an application based on a collection of procedures in a service program (SP) and some controlling programs that use these services. The good thing is that every connection with files and video interface is completely managed in the SP, without any duplication of code. The bad thing is that for every little change in the SP, after compiling and updating it, I must sign off and then again sign on in order to keep on testing. Unfortunately, AS400 keeps the old copy of the SP in memory and all the stuff works as though I've never made any change. Any suggestions? Thanks