Hi Paul, I'm sorry you are having a problem with updating your FTD101D. Looking at the Message thread, it looks as if the MAIN SDR firmware has been corrupted somehow. I think this because you mention

#update

Dear Bill, I have also problems with RS232 CAT conection and HRD software after last firmaware installation. In my case I cannot use USB port to comunicate because it's busy with SCU-LAN10 control pro

#update

try rts off

#update

my sub dsp is v01-05 also ,i would do a save menu to sd card and reflash radio

#update