TransMagic will not directly read or write a DXF or DWG file.  However, AutoCAD and Inventor are both able to produce and read a 3D CAD format (ACIS - .sat) that can be used in place of DXF or DWG files.

To convert from a supported file to a DWG:

1. Save the file into a ACIS or SAT file format. This file format is produced and readable by AutodCAD or Inventor.

2. You can then import the file into AutoCAD or Inventor and save it as a DWG or DXF