I seem to remember having trouble with multiple models that used SSS. When I dragged a 2nd model with unique SubSurfaceScattering Settings (or SSSS) I remember one of the models would not render properly (black or something) I am quite busy at the moment so if someone could try this...
1)start V16 and make 2 new models... one a red sphere and one a blue cube.
2) make a group for the CPs of the model(s) and activate SSS with unique settings for each.
3)Drag both models into the choreography and render a test frame, remember to turn ON SSS in the render cue.
If it renders fine- try adding a 2nd instance of each into the choreography. If it still renders fine, it's off to rehab with me...