Existing Saved Files open as new drawing

To whom it may concern; I am using Draftsight 2017 x64 and I have one particular dwg. file that opens up into a new drawing (NONAME) every time - despite the file showing over 5000 KB of saved data. I have had clients send back a file to me but their e-mail copy suffers the same fate. Is it possible to get behind the apparent new drawing to see the saved file?

Any help gratefully received !

T Rad