Sometimes when I load a large Poser object into Vue 6I then delete it, I find that there isn't enough memory left to load another large poly count object.  This manifests sometimes as missing arms (or perhaps whatever mesh parts were trying to load last when the memory limit hit).

Another problem I came across recently is a figure which loaded with all its props and child figures, but the figure was missing (not just arms missing but the whole figure).  I figured out the problem there was that the figure had been moved to another P6 external runtime so the PZ3 no longer knew (and so could no longer tell Vue, I'm guessing) where to find the obj file for the figure.  Once I reloaded the figure in P6 then renewed the PZ3, Vue saw it all.

I'm guessing your situation might be a memory limit.  I've found when figures start loading incompletely that I have to exit Vue entirely then reload the program... then my figures load completely.  In your case, if that doesn't work you may need to consider more RAM, or smaller poly count figures.  Another strategy which works well, and which I use alot, is to load an empty Vue scene, load my high poly count Poser object then save it as a Vue object.  Much less memory drain.

Good luck.