I'm trying to import different iges faces primary produced in CATIA and then converted into the iges format into the Cascade Sample program. A testing file consist of five iges faces. As the file is read and transferred it seems as everything work just fine and the process result in five translated Cascade shapes. But in the GUI only three of the shapes are possible to shade and have a look at. The other shapes only result in a visualisation of the border of the faces! Why? If I write the file read in to a new iges file and then look at the iges-file produce the iges faces really seem to be there.