Pulled an all nighter last night.   I now have User Defined function working so that you can call multiple functions and don't have to deal with the function stack at all.  I wrote several documented  test cases so it will be easy to see how everything works.  Input  parameters and return values c now be correctly read from the DataObject. Multifield datatypes are also functioning correctly.   I still have a bit of work to do to get full .net binding working but things are going much smoother now and I expect to have another release out this weekend.