Modiiyng a field value

I have a file with 4 fields:

Columns . . . :    1  80                                      Browse


 SEU==>


 FMT A* .....A*. 1 ...+... 2 ...+... 3 ...+... 4 ...+... 5 ...+... 6
...+.

        *************** Beginning of data
********************************

0001.00      A* TEMPORARY FILE FOR EARLY BUY FIX


0002.00      A          R ORDINV


0003.00      A            ORDNO          3S 0       TEXT('ORDER NUMBER')


0004.00      A            CUST           5          TEXT('CUSTOMER
NAME') 

0005.00      A            INVNO          3S 0       TEXT('INVOICE #')


0006.00      A            PROMO          3S 0       TEXT('PROMOTION
CODE')

0007.00      A          K ORDNO


 

The data I'm trying to change is:

 

Original file data: 
 
  1 XYZ   11  654 
  2 ABC   15  654 
  3 ABC   15  000 
  4 LKJ   18  000 
  5 LKJ   18  000 
  6 LKJ   18  321 
  7 LKJ   18  000 
  8 LKJ   18  000 
  9 FGH   23  000 
 10 FGH   23  000 
 11 FGH   23  000 
 12 FGH   23  987 
 13 JKL   48  000 
 14 JKL   48  000 
 15 JKL   48  000 
 
I'm trying to change it to: 
 
  1 XYZ   11  654 
  2 ABC   15  654 
  3 ABC   15  654 
  4 LKJ   18  321 
  5 LKJ   18  321 
  6 LKJ   18  321 
  7 LKJ   18  321 
  8 LKJ   18  321 
  9 FGH   23  987 
 10 FGH   23  987 
 11 FGH   23  987 
 12 FGH   23  987 
 13 JKL   48  000 
 14 JKL   48  000 
 15 JKL   48  000

 

So, whenever there is a value in the PROMO field it has to be populated
into the records with the same value in the INVNO field.

 

To do that I created a logical file keyed on the PROMO + INVNO fields.
I'm trying to read a file from the end to the begging and replace a
PROMO value.

Logical file and a program as following:

 

 

SEU==>                                                

 FMT FX FFilename++IPEASF.....L.....A.Device+.Keywords+

        *************** Beginning of data *************

0001.00 FORDINVL   UF   E           K DISK             

0002.00                                                

0003.00 D PROMO_S         S              3  0          

0004.00 D INVNO_S         S              3  0          

0005.00                                                

0006.00 C     *HIVAL        SETGT     ORDINVL          

0007.00 C                   READP     ORDINVL          

0008.00                                                

0009.00 C                   EVAL      INVNO_S = INVNO  

0010.00 C                   EVAL      PROMO_S = PROMO  

0011.00                                                

0012.00 C                   DOW       NOT %EOF         

0013.00 C                   READP     ORDINVL          

0014.00 C                   IF        INVNO = INVNO_S  

0015.00 C                   IF        PROMO_S <> 0     

0016.00 C                   EVAL      PROMO = PROMO_S  

0017.00 C                   UPDATE    ORDINV           

0018.00 C                   ENDIF                      

0019.00 C                   ELSE                       

0020.00 C                   EVAL      INVNO_S = INVNO  

0021.00 C                   EVAL      PROMO_S = PROMO  

0022.00                                                

0023.00 C                   ENDIF                      

0024.00                                                

0025.00 C                   ENDDO                      

0026.00                                                

0027.00 C                   EVAL      *INLR = *ON      

0028.00 C                   RETURN                     

0029.00                                                

                                                       

 

 

 

 

FMT LF .....A..........T.Name++++++.Len++TDpB......Functions++++++

        *************** Beginning of data *************************

0001.00      A          R ORDINV                    PFILE(ORDINV)  

0002.00      A          K INVNO                                    

0003.00      A          K PROMO                                    

        ****************** End of data ****************************

 

I get and error message:

 

Update or delete in file ORDINVL without prior input operation (C G D
F).

 

 

Please help me fix that error or is there another solution for the
problem?

 

 

Yuriy Veletnik

AS/400 Administrator

Trade Associates Group, ltd

1730 W. Wrightwood

Chicago, IL 60614

773.871.1300 x130