I use SketchUp 2014.
The file (attached) contains an image and a single poligon realized and exported in KML by Google Earth
When I run the kml tools for any files .kml everywhere it is in PC (c:, Desktop, other directory) always it says:

1. "the model does not contain a Google Earth terrain. Do you want import one first , Yes No"
   in both cases
2. "File seems non to exist. Please check the file path does not contain Unicode characters. This is a limitation of SketchUp and its Ruby version."

Where is the problem?

Thank you for all contributions.
Regards
Antimo

Good in Google Earth but not in SU.