450 FTP Reply Code - KB Article #1522Related Articles --
450 Requested file action not taken.
A 450 reply code may be sent in respones to any command requiring the server to access a local file. It is a transient negative reply as the error is considered a temporary one. It is usually sent when the server is unable to gain access to a required file at the time the command is received. In this case, the client is encouraged to restart the FTP transaction and try again.