The best way to export character animations is to bake all motions before they are written with Cinema 4D's “Cappucino” tool:
Make the parent object editable and keep it selected.
Go to Character > Manager > Cappucino.
In the “Cappucino” window, perform the following settings.
[ Image: Cappucino: Start Realtime, Pos, Scale, Rot = no, PLA = yes]
Drag the timeline slider to frame 0.
Click on an empty area of the viewport and keep the left mouse button pressed – the animation starts automatically.
When the last frame has been reached release the mouse.
Remove the deformer node from the object. The deformation should now be applied to the object on a vertex-level and work without the deformer.
Open the “RealFlow SD Exporter”, and export the object with the “vertex” option.