So huge shout out to the creators of the Racetrack route- I love it. I live about 60 miles west of Aurora on the track that ends just south of the station in Aurora on the route. Known as the Aurora Sub (appropriately), it stretches from Aurora all the way past Savanna, IL on the Mississippi River, and I believe it is technically still the Aurora Sub all the to Prairie Du Chien. Anyways, I'm trying to extend the route to create this subdivision. I struggle with terrain, as I don't know many places well enough east of Rochelle to try and eyeball the terrain. So, as suggested by barnez, I learned how to use DEM and attempted to import terrain data, and it has worked pretty well so far. At least to a certain point. I followed the guide here:
http://www14.zippyshare.com/v/65620703/file.html and skipped almost everything because the files, which I grabbed from here:
http://dds.cr.usgs.gov/srtm/version1/United_States_1arcsec/1arcsec/, were already in the .hgt format, so I didn't have to convert anything at all. So I created the DEM/SRTM folder and copied the .hgt files into that folder. Opened the route, clicked the Import data button, and selected SRTM and it worked right there at W. Aurora. So I got excited and moved on. Sugar Grove, Big Rock, Hinckley, Waterman, Shabbonna, all worked. But, then I got further west, and suddenly it was flat again. So I loaded in the data, and my game crashed. And I tried again with similar results. And again. So I tried another lat/long block that I downloaded the .hgt files for. Crashed again too. So I don't know what the deal is, why it worked one time and not the other. I did find though that it seems to be the longitude line of -89 where it crashes. You can see in this picture that line. Pretty clearly too.

So again, I'm not sure why it worked once and not again in a different spot. I re-downloaded the files and installed them again and it yields the same results. Here are the settings the Importer is set to and worked when I used it the first few times. Very confused.

Hopefully someone can find what I'm doing wrong and help me solve this issue! Tired of boring flatness in my routes. Hopefully I can get some realistic grades where they belong so I can run realistically on my home rails! Because this train should be bottoming out in a valley right hear and the top of a hill should be next to those elevators!

Any advice would be greatly appreciated!

Attached is the latest dump file, created from trying to create proper terrain through the terrain importer.
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