Because the program requires special library files to open an Inventor linked file, even if you use the Save As option and save the file to the AutoCAD format, information loss occurs. You can however use the AMVIEWOUT command to export drawing views to AutoCAD.
AMVIEWOUT enables you to export drawing views or an entire layout. However, if the layout contains two or more base views with different scales, the program cannot export them true scale at the same time. It can export them at their current scales, and it can export them true scale separately.