I use RDS - a lot - and it has not added or subtracted points from any mesh of mine unless I have had it do so. The main instability I have seen is with deleting - or pasting in mesh. If you do that, it is prudent to immediately save the file - close and reopen RDS - and reopen the file and proceed. You get freezes if you ask RDS to save too much information in the undo/temp file. I have a gig of RAM and plenty of HD space - I think it is a programming deficiency. Maybe the same guy did Poser 4 memory coding as did the RDS 5/5.5. This is not something you run into doing morphs very often. It is mostly a mesh construction problem. Doing controls is always a good idea when working with a new figure, or just getting started with morph building. If no points have been added or subtracted by you, the wrong number of verticies message means you have selected the wrong group or you have saved more than one group in the OBJ file. It is easy enough to check - an OBJ file is a text file. You can look at it with a text editor. If you apply a lButtock morph to the rButtock group, you will not get this message, by the way. Poser lets you apply the morph - the group shatters when you set the morph, but Poser does the math. A very useful tool is MASA's new Shaper. You can apply a morph in it and see an animation of its effect. You can also mirror some morphs. He says that function is limited when compared to MTM. At the least, you can see the geometry. This is useful for identifying strange or unknown OBJ files.