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