NEXTREC

 NEXTREC = nr

 nr  Is a scalar integer variable that is assigned
     a value as follows:

     - If the file is connected for direct access and a 
       record (r) was previously read or written, the value 
       assigned is r + 1.

     - If no record has been read or written, the value 
       assigned is 1.

     - If the file is not connected for direct access, or 
       if the file position cannot be determined because 
       of an error condition, the value assigned is zero.

     - If the file is connected for direct access and a REWIND
       has been performed on the file, the value assigned is 1.