Irrlicht Engine

It seems as though the Scene Manager can save a scene with dynamic shadows and Water but when it tries to load that same scene, This error is output: Could not create scene node of unknown type: shadowVolume
Could not create scene node of unknown type: waterSurface. As an effect, neither the water scene is displayed nor the dynamic shadow. Anyone has a suggestion to a solution.

Please stop cross-posting. This will only increase the number of flaming for your next posting, but not any helpful things.
The scene node serialization is not yet finished so there are some limitiations to be expected. These seem to be two.