The FIND statement positions a direct access file at a particular
  record and sets the associated variable of the file to that record
  number.  It is comparable to a direct access READ statement with no
  I/O list, and can open an existing file.  No data transfer takes
  place.  Statement format:

     FIND (u'r [,ERR=s] [,IOSTAT=ios])
     FIND ([UNIT=]u, REC=r [,ERR=s] [,IOSTAT=ios])

     u     Is a logical unit number.  It must refer to a
           relative organization file.

     r     Is the direct access record number.  It cannot
           be less than one or greater than the number of
           records defined for the file.

     s     Is the label of the executable statement that
           receives control if an error occurs.

     ios   Is an integer variable or integer array element
           that is defined as a positive integer if an error
           occurs, and as a zero if no error occurs.