Of course I cannot 'guarantee' this but that cable has never failed me on the units you list using both QD and PME.I guess I should have bought that usb cable instead of the rs232 cable i have now.
So, this USB cable will work? Im skeptical because im able to program a quickpanel JR with this same cable and laptop, but not able to program the Quickpanel .
I realized I had an older laptop (WIN98se) that crapped out on me over a year ago. I think that was the laptop I was using to program these, but forgot about that need before ditching the dang thing. UHG....
There is the possibility that your QP has a bad port.