A corrupt file maybe, try converting the .pcf file again? As far as the .rsr, poser makes one of those after it loads an .obj file (the one that is paired with the .obj is a short-hand version of the .obj itself so that it will load faster, it is not a required file) I've also had blank figures load up before generally caused by a corrupt .rsr, but since you say you haven't got an .rsr it could be the .obj itself.