When user tries to place a stair or railing he gets a message that "Section file is missing please find/load section file".
Only "Schematic" stairs and "Chairrail" railing are working.
Check the configuration variable STRUCTURAL_SHAPES value for the dataset you are using. Both the stairs and railing catalogs will use the structural sections found in the xml defined by the above configuration variable.
http://communities.bentley.com/products/building/building_analysis___design/f/5917/p/89287/254582.aspx#254582