Drawing elements missing in AutoCAD project.

Hello,

Hoping someone can help me out here.

Does anyone use AutoCAD? I get this "Drawing elements missing in AutoCAD project" message when I try to open .DWG extension file with the help of AutoCAD.

I am running Windows 8. My Laptop is Lenovo IdeaPad Y700-15AC

Why it is occurring? How to recover .dwg file?

SolidworksDrawings And Detailing