ALL of the kml/kmz files are publicly accessible via URL, and all work except for this one. It is larger than the others, at 16,000k bytes. Could it be a size issue?
I clicked the url and it asked to download so its there for sure...came in at 16.7MB. Until someone comes in with knowledge of a size limit, I'd take a look at the size of the next closest kml that works and remove as much data from a copy of this kml until it is at that size. Then try it again and see what happens.
I split the kml file into two parts and they both worked individually. Then I converted the original kml file into a 4MB kmz file and it failed with the same error. So it seems that there is a hard limit on placemarks or polygons unfortunately. And it doesn't seem to be a very high limit based on the failure of a 16MB file.
