Hi danperk, hmmm well the part labels seem to be generated ok when your object is exported as a solid - it generates 49 different part labels and there are 49 different surfaces in your model...

Do the part assignments seem to be correct when exported as a solid? I mean if you go into the Statistics pane in Modo you should see a "Part" category with 49 different entries under it. If you select some of those does a small portion of the mesh corresponding to one of the original surfaces get selected?

- Michael