Hi Jeff, can I ask what the end goal of your use of IP30H is? From what I can tell from this documentation (also all I could find) and from looking at the transaction in my system, it looks like this just schedules ALL maintenance plans in the system?
The confusing part is that the "specific time frame" is actually just a single field with a unit, so I'm not sure what that behavior is. It's also odd that it would just schedule ALL maintenance plans without more detailed selection criteria.
Come to think of it, this is probably why one of the custom SAP programs I've worked on in the past has been a tool for mass management and manipulation of maintenance plans...