coasterman1221,
Please visit my website and download the latest version of the Terraformer. It will get rid of the error you are experiencing.
http://www.gravimetricstudios.com
3D Objects must be in the 3DS file format and must be in the NoLimits Coasters "Objects" folder.
By default this is C:\Program Files\NoLimits Coasters\Objects
Once your 3D Objects are in this folder, start up the NL Editor and from the menu select "Scenery" and then "Choose Scene Object..." This will allow you to pick from the 3D Objects that are in the "Objects" folder.
Hope that helps!
- Tia