Xavier pcie flash

In the guide of NVIDIA Jetson AGX Xavier PCIe Endpoint Software for L4T,we do the step of Flashing the PCIe Endpoint on a Jetson AGX Xavier Series System, It remainds us of missing file,It can’t work.
When we find the missing file in the SDK documents,and we move it to the failing documents. It works, but the xavier SYSYTEM can’t start.
How can I solve the two problems as I have described?

Please tell us the exact steps you’ve tried and full error log.

YES,I have solved this problem, In the guide of l4t quick start.I do something before I do the flash . such as follows:

when I do the 'sudo tar xpf ’ .I finished the flash and the xavier sysytem worked.
Thanks for your help.