Sorry J, I knew I missed something: I forgot you were working with a headless V3, which throws things off. If you still have a morphed OBJ that contains the head, use that. Otherwise things are more complicated.

Just for clarification:

In Poser, the BODY does not have any geometry, it is an invisible parent/null/axis that helps make the figures easier to work with. Imagine if only the individual body parts showed up in the hierarchy editor, with no context as to which figure they belong; that would be a nightmare. It looks like you exported only the body parts below the neck in order to try and apply the morph directly to the body, but this will not work, and that's also why you're getting the "Wrong number of vertices" error. This isn't the first time someone has made this mistake; perhaps in future versions of Poser, this actor should be named FIGURE in order to avoid unnecessary confusion. And then actual figures should have names like James, Jessi, Victoria, etc, and not Figure 1, Figure 2, etc.

Whenever you export an OBJ without groups, you should export the entire figure. You should begin by importing the original OBJ (in this case, blMilWom_v3.obj) into Poser, and then exporting the groupless version with a different name. Import this new groupless OBJ into your modeler, sculpt it, export from the modeler with yet a third name, and then the steps above should work.