ArcMap 10.4.1 hangs when using the "layer to kml" tool. The kmz file is made and saved appropriately and the foreground geoprocessing window shows the job has completed. However, another window opens when the process is completed indicating that the program is "indexing features in <filename> kmz" file. There is a progress bar, but it does not move. I cannot Cancel, Escape, or X-out of the operation and other ArcMap functions don't work. Must kill the program in the Task Manager and restart ArcMap. Any ideas?