This is a B16 firmwaredownload failure case. Customer need upgradefirmware of 2 B16 switch from v5.1.0b to v6.2.2f. Any one have the experienced similar problem? Thx.<
Try connecting directly to the switch instead of doing it through the LAN.
On the other hand, review root folder of your FTP server. I have seen several issues like yours where the switch could not locate the directory with the code.
Also check your FTP settings to see if the user has reading credentials (supportsave and configupload, both write into the ftp but do not read).
I was able to recently update firmware using SCP by pointing to the directory name only. So if I unpack the v7.0.2c compressed file to the root directory of my server I would enter 'v7.0.2c' for the filename. The switch is able to traverse the directory structure automagically.
Also, I wasted serveral hours trying to get SolarWinds SCP server to function. I eventually tried Bitvise SSH and it worked great.