Total Commander

When I try to sync server to server I get an error message that it's not supported. When I do a file to file compare on the same remote folders it works fine.

So why not support a full folder sync?

You mean ftp servers? Or two plugins? This isn't supported because most ftp servers/plugins do not allow to change the remote file timestamp. Therefore no equality could be achieved. When synchronizing with local files, the local file timestamp is changed if the remote timestamp cannot be changed.

It's secure ftp on both sides on the same server.

I think TC could just show a warning that no complere sync is possible but it still should allow copying files between the sides...