Unable to flash 3 Jetsen TX2 units with 4.2.2

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
10

I also found this discussion:

https://devtalk.nvidia.com/default/topic/1050471/-install-jet-pack-4-2-on-jetson-tx2/

and tried the same code change:

bootauth="";
if [ "${fuselevel}" = "" ]; then
        echo "hwchipid = ${hwchipid}";
        echo "get fuse level";
        get_fuse_level fuselevel hwchipid bootauth;
        echo "hwchipid = ${hwchipid}";

these are the results:

ken@minibeast:~/nvidia/nvidia_sdk/JetPack_4.2.2_Linux_GA_P3310/Linux_for_Tegra$ sudo ./flash.sh jetson-tx2 mmcblk0p1
###############################################################################
# L4T BSP Information:
# R32 , REVISION: 2.1
###############################################################################
hwchipid = 
get fuse level
hwchipid = 
Error: probing the target board failed.
       Make sure the target board is connected through 
       USB port and is in recovery mode.