Fixed bug if no fastforward or time was specified

                jobs_from_file, timestep_start_from_file, timestep_end_from_file, args_from_file = self.load_snapshot(

                    file)

                if args_from_file is not None:

                    print("File was generated with:"

                          f"\n--system {args_from_file.system} "

                          f"-ff {args_from_file.fastforward} "

                          f"-t {args_from_file.time}\n"

                          f"All Args:\n{args_from_file}"

                          "To use these set them from the commandline!"

                          )

                    print(f"File was generated with:"

                          f"\n--system {args_from_file.system} ")

                    if hasattr(args_from_file, 'fastforward'):

                        print(f"-ff {args_from_file.fastforward} ")

                    if hasattr(args_from_file, 'time'):

                        print(f"-t {args_from_file.time}")

                    print(f"All Args:\n{args_from_file}"

                          "\nTo use these set them from the commandline!")

                else:

                    print("No generation arguments extracted from input file!")

                    # Args are usually extracted to tell the users how to reporduce results.