Host “…” does not exist

You may get this message when connecting to a server for following reasons:

• You may have typed a wrong hostname on Login dialog.
• Your domain name is new and is not fully distributed to DNS servers yet.
• Connection was blocked by firewall. Please refer to FAQ.
• Problem with DNS server.
• Common mistake is to enter full URL (e.g. ftp://ftp.example.com) as hostname on Login dialog instead of actual hostname (e.g. ftp.example.com).
• In scripting, you may get this error when using open site_name syntax in an environment, where stored site site_name does not exist. The site_name will then be used as a hostname instead. See Why WinSCP does not work in a new environment (operating system, machine, user account, network), when it works for me in a different environment already?
• Server IPv6 address might by misconfigured. Try forcing IPv4 in Internet protocol version session settings.