That's interesting, and very odd. It is showing two bodies in the model browser tree, under the Solid Bodies folder, but is oddly not showing any 'proper'/native features below the Origin folder. Just a couple icons that look like the body icons, with names like "None" & "None_1", for some reason. And I too get zero bodies from the following code within that part:
Dim oPDoc As PartDocument = ThisDoc.Document
MsgBox("Bodies Count = " & oPDoc.ComponentDefinition.SurfaceBodies.Count.ToString,,"")
How was this part created? Is it imported from some other file type? Did it get some other part(s) derived into it, but the 'Link' was broken to its/their source? Please explain.
Wesley Crihfield

(Not an Autodesk Employee)