For those like me that has been struggling to send the model from Revit to Robot, please watch these videos.
There are very good tips about improving your analytical model before sending to Robot.
This paper explores the interoperability between Autodesk Revit, Revit Structure, and Robot Structural
Analysis Professional—including recommended workflows, analytical modeling best practices, and
the details of the data exchange between the software solutions.
Example how to correct analytical columns and walls : http://screencast.com/t/kJAUqeyqq
Example how to correct openings in floors slabs (it works only if opening is drawn by user ; it does not work for openings generated automatically by shafts, voids etc) : http://screencast.com/t/sUDHNyU7y
Example how to correct outer analytical slab edges : http://screencast.com/t/PAQJr1vNU