After reading this page https://winscp.net/eng/docs/message_unexpected_close
I assume that when we can't connect with the SFTP command, we can't force the SCP connection.
However, I have this use case: I'm connecting through a FRONT-END SSH client that calls to WinSCP using the command line. And when connecting to a server that ONLY supports SCP and not SFTP, I can't connect because the error 127. The problem is that the Window only has three options: OK, RECONNECT and HELP. But it lacks the "RECONNECT WITH SCP" button. As you can imagine I can't connect directly because the connection is handled by the front-end stablishing a tunnel and I don't have access to the command line.
Please, can you add this option to this Window?