what does ssl error mean
Robo-FTP may report an SSL protocol error when it is unable to negotiate a secure connection with the remote server. This may happen when the server requires a client certificate for user authentication. The administrator of the remote server should be able to confirm if a certificate is required. In Robo-FTP 3.8 and earlier this message was printed in the Trace Log, often with a reason code of 60000. In Robo-FTP 3.9 the SSL protocol error message also appears in the main console and Script Log. Note: Some HTTPS servers also require client certificates for user authentication.