you have'nt told us the full model?

I have a gt3-tp mk3. uses bf-f8hp

From: chirp_users-bounces@intrepid.danplanet.com <chirp_users-bounces@intrepid.danplanet.com> on behalf of P² via chirp_users <chirp_users@intrepid.danplanet.com>
Sent: 07 August 2018 18:42
To: chirp_users@intrepid.danplanet.com
Subject: Re: [chirp_users] GT-3

Programmed some radios for club members and successfully programmed a couple of UV-5Rs. The a guy showed up with a GT-3. Used the GT-3WP selection and tried to upload a file. I got some kind of firmware mismatch message. Did spend a lot of time with it, but just asking if anyone has run across this problem and how to fix....

de NH6BF