I was using a GenX converted figure which worked fine and then suddenly the genesis figure lost its V4 morph - dial is still there, but the mesh had changed back to neutral. The genX morphs still work. I was changing textures at that time.

Morph is still there in the data folder and not changed. Restarting Poser and reloading the scene does not work. Applying the preset again does not work either. It is only that morph which seem to have gone.

I do have a V4 in the scene, but I had that all the time to compare the figures

I guess it means starting the scene from scratch again, but I think I'll wait until I know what the problem is/was.