name of the file for output:  fbn_contrib.res
        name of .par file for the fit:  fbn.par
        name of .res file from PIFORM:  fbn.res
   name of .egy file with derivatives:  fbn.egy
________________________________________
         d e s c r i p t o r            |_____ d a t a (starting on column 41)  
                                        


Only the first threelines of this file are read,
other versions can be stored here.