Hi all,
I have exactly the same issue with an A603 board and an Orin Nano 4G module. When trying to flash an NVMe device it seems the device is not exposed to the PC for flashing. Curiously, if I connect an empty USB device to the A603 board the NVMe is correctly exposed and the flash process completes successfully. I have tried it many times with the same result: fail without USB, success with it. Please note the USB is not used at all, the device flashed is the NVMe.
I have the logs but I’m not able to upload files right now.