did "arcgis for autocad" work with the free autocad viewer ?
which free autocad viewer would that be? Do you mean is it integrated inside it? or do you mean the viewer will read cad files from ArcGIS for autocad?
I don't think so.
AutoCAD 2013, AutoCAD 2014, and AutoCAD 2015 (32-bit and 64-bit) are supported. This includes Autodesk products with full versions of AutoCAD, including AutoCAD Civil 3D and Map 3D.
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