We have this error message since Signature update 422 when we try to update from ftp local server with command:
FTP server is from Windows XP IIS, and worked fine from signatura version 407 to signature version 421.
Tha anonymous access to this FTP server and the signature file is working fine from other PCs and hardwares.
We have to upgrade from "Update is Located on this client" ->Local File Path
Thanks in advance!