MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
That's a new one. Try downloading a fresh version of the file. Maybe yours got messed up somehow. Also, there are some tooth geometries that this file hasn't been tested for. If it is still giving you problems, let me know what parameters you want and I'll try with an alternate generator I have.