Yes, custom scenery is usually downloaded.
Since all things are original in your game, did you change any scenery configurations (adding or removing from the scenery tabs) in the scenario since starting?
If no, then there is a rogue piece of scenery. It happens. Usually after a building session where the piece gets used, but sometimes just as it gets detected. Four ways to proceed...
1. If you make a backup after each session, go to the previous version of your park and see if it opens. If you don't make backups, well this is how people learn they should. I usually just add the next consecutive number to the park name. (parkname53, parkname54, parkname55, you get the picture) Save with the new number frequently or as you end the session.
2. In the Data folder (not ObjData) locate the game.cfg and the plugin.dat files. Move one to your desktop and reboot the game. If it does not work or boot, put it back and move the other and try rebooting the game and if possible your park. Sometimes these get rebuilt when they are missing and this solves the problem.
3. In our Downloads - Trainers and Utilities, there is a DatChecker V1.2 that will examine your dat files and give you a validity status on them all. This will identify sketchy or problem scenery.
4. This is the long and difficult way. Back up (copy) your ObjData folder somewhere for safekeeping. Now create an empty folder and move at most 5 pieces of scenery from the in game (original, not the backup copy) ObjData folder and reboot the game and your park. If you get the violation error, exit and move those back and then try the next 5 pieces. When the game and your park loads without the error - you have located 5 possible problems. Move each one back and reboot/reload until you get the error. When you get the error again, the piece you just moved back is the problem. Move it to the temp folder and the others back. It is not uncommon to have a bad piece of scenery from install. Let us know which one it is, and we can supply you with a replacement.
If none of these work, the last ditch attempt is to save your park file to the desktop, then uninstall the game, reboot, run a registry cleaner, and reinstall. After reinstallation, copy the park back. This does work if there is a game install or modification problem. But there is no guarantee that your saved game file is not damaged. You may want to check out the Saved Game Modifier program in that case. What do you have to lose?
Remember - backup, backup, backup each game as you build...
Good luck - and keep us posted.
