As described in Chapter VI, the system configuration is not yet automatically produced by the control system. Neither does the system.config file, which is used by CONSTRICTOR for system configuration information, control the NPOI configuration. Ideally, the system configuration file is deposited in the same directory used for the observing list the day before observing. A script on sextans automatically transfers this file to the proper system area. If this is not done, the file system.config can always be placed in the directory where CONSTRICTOR is run, and will be loaded automatically, overriding any system configuration embedded in the raw data stream.