I have an old version of AutoCAD (2002). I was recently sent a newer version that I opened with DWG TrueView. There was nothing in model space, but over three megs of entities in paper space tabs. The file converted successfully -- the file (same size; 3mg) opened and the tabs, layers, etc., were all there. The only thing was that no entities were visible. All layers were on, present blocks could be inserted, but nothing was on the tabbed pages. The main page that was open in TrueView, could be plotted to a printer or to PDF, yet nothing was visible when the converted file was opened in 2002. What am I missing??  P.S.: When I printed a log of converted material, the log identified what was converted as an AutoCAD file that had been saved from an Autodesk Inventor file. But that shouldn't make any difference if it was viewable in the TrueView application, should it?-Mark-