yes                                                                                                                                                                                                                                 no                                                                                                                         
                                                                                                                                                                        graphviz installed?                                                                                                                                                                                                                                                                                                
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
                          process all                                                                                                                                                                                       process only                                                                                                                                                                                                                                                   
                           diagrams                                                                                                                                                                                         sequence                                                                            and                                                                  activity                                                                                      diagrams