*HEADING
  TEST SUBSTRUCTURE DIRECTORY 
*SUBSTRUCTURE DIRECTORY,LIBRARY=substrframe_2level_gen1
*SUBSTRUCTURE DIRECTORY,LIBRARY=substrframe_2level_gen2
*SUBSTRUCTURE DIRECTORY,LIBRARY=substrframe_2level_gen3
*SUBSTRUCTURE DIRECTORY,LIBRARY=substrframe_2level_gen4
*SUBSTRUCTURE COPY,OLD LIBRARY=substrframe_2level_gen4,
OLD TYPE=Z201, NEW LIBRARY=substrframe_2level_gen2, NEW TYPE=Z102
*SUBSTRUCTURE DIRECTORY,LIBRARY=substrframe_2level_gen1
*SUBSTRUCTURE DIRECTORY,LIBRARY=substrframe_2level_gen2
*SUBSTRUCTURE DIRECTORY,LIBRARY=substrframe_2level_gen3
*SUBSTRUCTURE DIRECTORY,LIBRARY=substrframe_2level_gen4