ugh, this has plagued me for awhile.
which is why, now, in my Nia pack i actually wrote the specific daz ps_#### number in the product requirements.

the newest confusion: ive been getting messages from some people who say they cant load my morphs on vicky. so i get them to redownload the .zip from rosity, go through the installation process and troubleshoot for awhile... asking them to check and see if they have the blMilWom_v3.obj object in their geometries/DAZPeople folder. they say no, they have blMilWom_v3RR.obj (or something like that).

turns out that they are trying to load my V3 morphs on the vicky 3 reduced res figure. if even a single polygon of the target figure is different then a morph wont load, and V3 reduced res has half the polygons of V3 so of course it wont work.
i dont blame the customer for this, i blame daz. the V3 RR figure should have a notice saying 'standard V3 morphs will not work with this figure'.... in 60 point, flashing, bold, neon orange letters. currently there isnt even a fine print notice informing customers of this, so it is understandable that someone not technically familiar with 3D would conclude that all V3 content will work on the reduced res figures.