Originally Posted by ElroyJetson
The answer is that my specific programming cable is the wrong one. I use a data/keyload cable for my 7100IPs, etc. which is fine for programming those radios. But the 7200 must have the CORRECT cable connected to its accessory cable or it won't even allow you to enter programming mode.
It's a bit odd but that's what it is.
Actually if you don't have data enabled in the radio personality it'll go into program mode automatically when you try to talk to it with RPM. All the latest radios do this, and the latest P7100 code does it too. That way it won't care what cable you have attached.