What CAM converter asre you using.
I use Solid Works.
I am not sure if this is an issue because I have only dabbled with Rhino:
I opened the file in a demo I have. I noticed that you had multiple bodies(parts or whatever Rhino adresses them as). in that single part file. I was able to move parts all over the place. Nothing was mated with anything else or merged together.
Could this be creating the issue?
Depending on how Rhino creates STL files and or tool path files it could be finding an issue with the fact that they are not merged together. It may be having issues figuring out how to machine the faces that are internal and adjacent to other parts. Or if there are gaps between them.
I would try merging them together and take another whack at it.
In SW when you genertae an STL file it will merge seperate and touching bodies into a single cohesive STL geometry. However the proper manner is to merge all the bodies in a part into on body.