|If you have an opportunity, establish yourself AutoCAD 2012. Or open your .BAK file on any other computer where there is AutoCAD 2012 or other newer AutoCAD version, than yours 2000. If .BAK file is successfully opens, save it in AutoCAD 2000 format. Then you can open the file in your version of AutoCAD 2000. |
It is possible to come on a forum and to look that speak there.
I very much advise besides .BAK-files to use files of autosave of .SV$, i.e. this function to keep it turned on. Besides, it is always useful to check that just saved file normally opens. If suddenly it not so, urgently to take measures (to address to .BAK and autosaves of .SV$)