sm-t927a frp locked

hi there guys, i have a samsung sm-t927a that my child has forgotten the google account password...so i have tried to redo the firmware with oden 3.13.1 and i keep getting a binary error when i try to load the firmware..however if i try and just load the cp file it seems to go and reboot...i really need some ideas on this thing since i paid big bucks for this thing...any help would be appreciated....