IMAGE fail

Please ask about Orin’s system IMAGE backup and restore problems
Copy IMAGE:sudo ./ -r -k APP -G backup.img p3737-0000+p3701-0000 mmcblk0p1
Brush IMAGE: sudo ./ -r -k APP p3737-0000+p3701-0000 mmcblk0p1
The following error occurs when flashing:
[ 20.7669 ] Writing partition APP with /home/leen/nvidia/nvidia_sdk/JetPack_5.1_Linux_JETSON_AGX_ORIN_TARGETS/Linux_for_Tegra/bootloader/system.img [ 26246728276 bytes ]
Error: Return value 3 ] 000%
Command tegradevflash_v2 --write APP /home/leen/nvidia/nvidia_sdk/JetPack_5.1_Linux_JETSON_AGX_ORIN_TARGETS/Linux_for_Tegra/bootloader/system.img
Failed to flash/read t186ref.
Ask me what the reason for the failure is

Hi machuang,

What’s the size of backup.img.raw just generated from the first command?

Could you help to provide the full flash log for further check?