It could be that your process hangs because of an issue with the SRTM data. You can set the useSRTM option to false. If you need SRTM you can follow this post to fix the SRTM problem.
It could be that your process hangs because of an issue with the SRTM data. You can set the useSRTM option to false. If you need SRTM you can follow this post to fix the SRTM problem.