Dynamic sections are cut using the Open CrossSection Views command, and when the view to display the sections is chosen, every section is empty. No corridor, components, or terrain display in the cross section view.
This problem could be caused if the "Default-3D" model has been previously deleted from the DGN file. When any 3D data is created (such as terrain models, corridors, and civil geometry/profiles) the program uses the Default-3D model to display the 3D data, and then the Open CrossSection Views command also uses the model as it cuts dynamic sections through the 3D elements. If the "Default-3D" model has been deleted, the Open CrossSection Views command is unable to locate the 3D elements to display in cross section.