The server file deletion might be, but I'm doubtful. In either case, it was OS X that was giving useless error messages. Like this, except I wasn't moving it to trash:
That's the best thing about Windows. It works even for the things that are called 'exotic' in the Mac world (which is a euphemism for 'sloppy programming')
Extrapolating from that experience (which might be entirely to the remote server setup or network issues) is not exactly scientific.