I am working on animation project using MakeHuman, blender and Mathematica. I use makeHuman to model a person and get .mhx file. I import this file into blender, I do some modification on pose and export it as .stl to use it on mathematica. I remark that exported .stl file seems empty because its size 84 bytes and when I import it on mathematica it does not work. So what is the problem and How can I deal with? thanks.
OK, apparently even when you export to STL through the File > Export menu, you must select all before exporting. If your mesh is not selected, it will not be exported.
Do note that non-mesh objects will not be exported either (curves, armatures, etc).
In short, select all objects in your scene (A), then export to STL.