So wouldn't that be the greatest function ever? Well, the best lesson learned is read the Manuals since I find that what I once glanced over, actually had the key words that told me I was doing it all wrong. For instance creating separate heat pump plants and linking them together with the same geoloop. Major errors, cannot be done. Well after rereading I created the 1st heat pump (opt-vent units plant coil at System level) as the 1st plant and put in the capacity, then created the GSHP's to all the sleeping quarters and left that open capacity with the coil in the rooms, then tied the two together in Parallel-Decoupled. So the 1st HP did what it could do up to the capacity specified, then the 2nd kicked in to handle the remaining load. No errors. The greatest lesson-learned through this mental process was backing up to where I was before I mucked it up. So I got in the habit of saving to a "testing" file folder and run it, if it looked like I made forward progress, I'd save it back over the original, if not I made a note in a Readme.txt file to refer to later and went back to the original to try the next 'tweak'. Also, check out the Scan for Errors to get clues as to what the program has interpreted your input as.