As a follow-up, I was able to have someone send me the parent file for the file I mentioned above. But when I try to open it it tells me it needs to update, so I hit OK. It then tells me This is an unrecognized file. It may be a Vectorworks file created by a newer version (unlikely since it told me it needed to update), it may be a very old MiniCAD file (it's not), it may have been created by another application (again, not the case), or it may have been corrupted by a hardware or system error. I really need to be able to use these files, can anyone help?