I've had this problem before and someone was nice enough to open it and send it back to where I could open it in Chief. My question is what do I need to tell this person on how to send it so it can be opened in Chief. I receive DWGs from people and don't have any problems so it must be the way they are sending it. I've attached the error I'm getting along with the file in question.
TIA,
House Plans.dwg