Does the route still crash when you go to Keane?
Close TRS19
Go back to Content Manager.
Enable the Status column if you haven't already.
Right-click on one of the columns and check the box next to Status.
The column will appear on the far right.
Click on the column and drag it where you want on to, on the column bar.
In the status column, you will see Installed, Modified, etc., with Disabled after it on the right.
With all your assets disabled, you can now go through the process of elimination to find out which one is causing the crash.
Highlight 10 or 20 assets.
Click on the Content menu and choose Enable.
Go back to your Eagle River Railway route and see if it crashes at Keane.
If it doesn't crash, then enable another 10 or 20 assets.
Try again.
Keep repeating this until it crashes.
Go back into Content Manager again, and disable the last 10 assets.
Try the route again.
Back in Content Manager, enable another asset.
Repeat.
Mr. Murphy, as in the famous Mr. Murphy who wrote the great law, has guaranteed the failure will be caused by the last asset you disable. ;-)
Take note of the asset, remove it and reinstall.
This is a long process.