VH4032N - Backup no work

From https://openwrt.org/toh/observatelecom/vh4032n

"Plug the router's power source and look at the serial console, press any key to break into CFE. Now it's time to run the ram firmware, execute this command into the CFE command line


and wait few second until openwrt loads."

Result..."Command status = -18"


Any idea?

Can you provide details on the TFTP server setup to load the initramfs file?

I noticed you mentioned nothing about it.