IBM i V5R4 to V7R1
We are in the middle of testing every app in every LPAR to make sure that it all works. We have code written in Lansa, RPG, CL, and Java. Some apps are home-grown and some were purchased.
V6 is the behemoth update while V7 is much smaller. As you might be aware, the V6 upgrade process must touch every program object due to a new memory management system. This requires that every program object be observable. If any aren’t, they will no longer execute. This has been a challenge for us since we began with about 10,000 non-observable objects. Now we are at a much more manageable number.