Hi,
There is a bug in initrd_flash individual partition. You will need to add below into tools/kernel_flash/l4t_flash_from_kernel.sh
function do_write_APP
{
local item="${1}"
local external="${2}"
local count="${3}"
local file_image
local sha1_file
local sha1_chksum=
local APP_partition=
local device_type=
local disk=
local part_name
local tool=mkfs.ext4
local location=""
local name=
local ext=
device_type=$(echo "$item" | cut -d, -f 2 | sed 's/^ //g' - | cut -d: -f 1)
part_name=$(echo "${item}" | cut -d, -f 2 | sed 's/^ //g' - | cut -d: -f 3)
if [ -n "${target_partname}" ] && [ "${target_partname}" != "${part_name}" ]; then
echo "Skip writing ${part_name}"
return
fi