Stopped Working?

Fired up the programmer to program the system disk for  MyCP/M V3, and it freezes:

Upload HEX8-16 to W29C020 Flash ROM (no SDP)

Ready for upload
S:0
A:0
A:80
A:100
A:180
A:200
A:280
A:300
A:380
A:400
A:480
A:500
A:580
A:600

Swapped the USB cable, the flash chip and cleaned the board to remove flux. Checked the HEX file and the GTK Terminal settings. No  solution. Tried the older version of the code, same.

Actually there is no flow control, no data being sent (according tothe Nano LEDs), no movement on the data sent bar, so it has to be GTK Term is waiting for something or is stopped.

I have just completed a fresh Linux Mint Mate 20.2 install so it must be GTK Term or the USB port. I guessing its GTK Term.

Installed picocom and it uploaded the system hex file without problem but My CP/M V3 did not boot up. This is the part I hate. Trying to work out where the fault lies.

AlanX