Because technical support doesn't answer 2 weeks, I will ask at a forum.

In THIS (http://help.solidworks.com/2012/english/api/sldworksapi/get_coordinate_system_transform_example_vb.htm) example "GetCoordinateSystemTransformByName" allways retun null. I try to create this example by C# and get the same error.

(feature are selected in feature tree, solidworks object is not null)

Any ideas?