Can you tell me if this is helpful? I’m looking to create a standard response to SketchUp Pro users with this error. Thanks!
All DWG files aren’t created equal and there are several factors that can affect whether the file will import into SketchUp successfully. Because the DWG format is proprietary to AutoDesk there isn’t a standard by which all other software uses when importing or exporting that file type. Our recommendation when working with DWG files in SketchUp is to export them to an older, simpler version of the DWG standard such as AutoCAD 2000. Because SketchUp is only importing the geometry from the file and won’t recognize any other objects such as BIM objects or AutoCAD specific data types it won’t be a problem to use the older format. If you created the file in AutoCAD then you may wish to explode all objects into their most basic components before saving for use in SketchUp as well. If you’re using other CAD software then using an older format will improve the likelihood of compatibility with SketchUp if you can’t export directly to SKP from that software already.
To learn more about importing DWG files in SketchUp be sure to check out our video on the subject here: http://help.sketchup.com/en/article/86648
We also have a great blog from one of our engineers on importing DWG files: http://www.thomthom.net/thoughts/2012/12/sketchup-dwg-import-guide/