Can anyone explain the behavior for this file.
The file are created in AutoCAD 2007.
It is a drawing with 2D and 3D drawing in it.
When I open this file in my AutoCAD2013 and make the recovery as AutoCAD suggest
The are no 3D left in the drawing. The file are working fine and whiteout no plebes I AutoCAD2007
Autodesk Product Design Suite Ultimate 2013
AutoCAD Mechanical 2013
at least there are some AEC-objects in it as (I tested it with AutoCAD 2012 now) the AEC-modules are loaded.
And when doing the _RECOVER it tells me that there are 5 objects deleted (I don't know which ones, of course). So the question I have: are you really sure that there are 3D-objects in it? I see 3D-like objects (flattened ones), but nothing in it is 3D.
I would suggest then: open your drawings with 2007, run command _WBLOCK and create a new drawing from your selected objects in modelspace. Then open this new drawing in 2013 (and import your layouts if there are one and you need them in a second step).
Good luck, - alfred -