Error 16                                                        Error 17: Not in compile mode.                                  Error 18: Not in execution mode.                                Error 19: Compiled conditionals do not match.                   Error 20: Stack pointer <> CSP; unfinished definition.          Error 21: Cannot forget.                                        Error 22: Not in loading mode.                                  Error 23                                                        Error 24                                                        Error 25                                                        Error 26                                                        Error 27                                                        Error 28                                                        Error 29                                                        Error 30                                                        Error 31                                                        