You will see a `*' prompt. This is KEYIN communication; you can modify parameters interactively (which you should NOT, unless you edit the parameter file accordingly). Type, e.g., @1997-08-02.par, and KEYIN will read the parameter file. Type show, and you will get the current setting of the parameters. Then, if everything is OK (check carefully!), hit `/'. CONSTRICTOR will now open all files, create packet listings which are saved in the .dir files (or read a .dir file if available from rawlist), and process all data (falling in between StartTime and StopTime). At the end, you will be returned to KEYIN, at which point you should type quit to exit CONSTRICTOR.