Did this happen every time you've tried to make an incremental backup? What kind of FTP server are you running (is it NAS with FTP access, an old machine running a FTP server,...)? Are you able to reproduce the error? If so, I guess there is another thing that actually causes the FTP server to close the connection.
Did this happen every time you've tried to make an incremental backup? What kind of FTP server are you running (is it NAS with FTP access, an old machine running a FTP server,...)? Are you able to reproduce the error? If so, I guess there is another thing that actually causes the FTP server to close the connection.