Are you using p3509 as your carrier board for your Orin NX module?
The Jetpack5.1.1(R35.3.1) is released, could you help to use the BSP package and instruction instead of nvidia_sdk/JetPack_5.1_Linux_JETSON_XAVIER_NX_TARGETS/ downloaded from SDKM?
I used two types of carrier boards: This is a p3509 board from nvidia devkit and a custom carrier board from leetop product(LeeTop)
Unfortunately, both boards received the rootfs of 35.2.1 / 35.3.1, so I flashed it through the command of Jetson Orin NX + Xavier NX Devkit (NVMe) in the course I first ran, but I got the same result.
(I attach the log flashed through 35.3.1)
After struggling with this problem for several days, after installing the xavier nx module on two types of p3509 boards and applying (successfully) flashing the jetpack 5.1 in the SDK, removing the xavier module from the nvidia devkit and uploading the orin nx module, the flash( command in the terminal) It was successful, and the same orin nx module was installed on the board of the leetop product, and the flash failed.