Reverse flushing fails for Jetson NX

I was trying to clone a jetson xavier nx image via

sudo ./ -r -k APP -G backup.img jetson-xavier-nx-devkit mmcblk0p1

it fails and return that error

Error: Return value 14
Command tegradevflash_v2 --read APP /home/karim/NX_flash/Jetson_Linux_R32.5.2_aarch64/Linux_for_Tegra/backup.img
*** The [APP] has been read successfully. ***
Converting RAW image to Sparse image…

What the error means ? Is the img file that is created corrupted or not ?
Thanks in advance,

Is this a Sdcard NX module or emmc one?

It is a SD-card module.

For sdcard case, please refer to

Is it possible to use to clone the image instead of this method ?

Only feasible for emmc based module.

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