Hi,
I import my object file (into Poser7), go to the setup room, add bones, group bones to the various parts of the mesh, and then exit the setup room.  Next I adjust the joint parameters and then save my new figure.  If I exit and restart poser, and then try to load the figure, it is (totally) invisible and not selectable.  If I then return to the setup room, the bones are all there but there is no mesh.

I don't know if the following information is helpful, but the object was created in Hexagon, UV mapped using Roadkill, then passed through UVMapper before saving.  I then opened it again in Hexagon to cut up the mesh.  I didn't assign any material to the object, instead relying on a texture map generated from the UV map.  Could the lack of a material with the object file cause Poser to 'lose' the object but maintain its bone structure (does this make any sense?).

Thanks.