Sometimes I think I have understood the answer but I haven’t got it right so I come back to the question. It’s not that the answer was wrong, it’s just that I didn’t get it right. 
Take the Electrical Type for pins for GND. Someone told me to make the pins on my Symbols Power Input and I did that, but it trns out that some of them have to be Power Output. Consider the standard (from library conn) Barrel Jack, one of these
This gets to me with all pins Passive. I edit this so that 1 is Passive and the others Power Output when I save it I get
and I have not option but to click Yes (clicking No achieves nothing). Clicking Yes saves it in RESCUE
If I load it from that library (in place of the original) I seem to get somewhere. Given some furthjer jiggery-pokery with the two power supplies (also now inserted from RESCUE although that is not shown in the schematic I get
This feels great. The Rules Test has come up clean. I must be getting somewhere
. Hold your breath 
. Let’s try a Netlist:
That’s It! That’s all I get on my PCB.
Please excuse me if I am a little frustrated and confused. 
Their is something strange going on. If I open emphasized text my symbols library in C:\Program Files\KiCad\share\kicad\Library it does not have (for example) AP1117-50 in it. I must have some pathing problem. I will investigate.