Hi Joseph,
I haven’t your shape file data, so I can’t reproduce this issue. I just use our “Austinstreets.shp” to test it, the “rtg” file can be generated correctly as following statements:
ShapeFileFeatureSource featureSource = new ShapeFileFeatureSource(@"......\SampleData\Austinstreets.shp");
RtgRoutingSource.GenerateRoutingData(@"......\SampleData\Austinstreets.rtg", featureSource);
The latest version what I tested is 7.0.261.0, could you please tell me your version number?
Regards,
Don