<< I was able to read and write using Chirp with my UV-5X3 a few weeks ago

without any issues. Has something changed? >>

Dunno if they’ve changed anything, Bob, but I’d hold onto whatever build you used a couple weeks ago, just in case. The build that is failing for me is today’s… "chirp-daily-20161018.app”. I’ve also got a copy of build “chirp-daily-20161005” and that fails in exactly the same manner.

<< I had the same error message while trying to program the Btech UV-5001. Once I put the radio in VFO mode, I turned it off and back on again. I was able to read and program the radio. I have no idea why this worked, but it did. Good luck. >>

Thanks for the tip, Toby. Alas, toggling VFO mode didn’t work for me. Glad yours cleared up ok.

Jeff