The Google Earth Extension for AutoCAD lets you publish your designs from AutoCAD, AutoCAD Architecture, AutoCAD Civil 3D, and AutoCAD Map. You can download this extension from:
PROBLEM: After downloading and installing, some people encounter a problem when they attempt to publish their designs to Google Earth. They see an error message that AeccDWGToGE.arx (AutoCAD Runtime eXtension) is unable to load.
WORKAROUND: This happens when the extension cannot find all of the supporting operating system capabilities it needs. The Google Earth Extension was developed by the AutoCAD team in C++ using Visual Studio 2005 SP1; hence, it relies on the Microsoft Visual C++ 2005 SP1 Redistributable Package. Users who encounter the problem can update their system DLLs (dynamically loadable libraries) to allow the Google Earth Extension to run by following the steps in the Microsoft article:
Identifying OS dependencies so you can give our technology previews a whirl is alive in the lab.