Just to quickly recap’ the update procedure:
1. in system mode (power-on or reset with ESC pressed) you first send the OS installer file to the machine, and flash it (red program)
2. after rebooting into the OS updater you are ready to send it the OS file, which you then flash (red program button again).
3. start without loading the flash memory (CLR pressed) and save the clear state to flash.
Which part of the procedure (1 or 2 obviously) causes problems?