I'm getting an invalid AutoCAD DWG or DXF file message.

      NOTICE: SketchUp 2015 is here! When you look at this Knowledge Center article, be sure to pick "SketchUp 2015" from the red box above to see the 2015 version of that content. If there is no version picker, this content applies to all versions of SketchUp.

Situation: You try to import an AutoCAD DWG or DXF file into SketchUp and you get this message:

Error opening AutoCAD import file: Invalid group code.

This does not appear to be a valid AutoCAD DWG or DXF file.

The DWG/DXF file is corrupt. You can verify this by running the Audit command in AutoCAD.