Error Extracting data from a STRUCTURE in SELECT statement

Question

Hi,
I have an SAP defined structure BIW_KNA1_S which has been enhanced with 2 fields (ZZS1 and ZZS2). I need to populate these 2 fields with data from the 2 SORT fields from ADRC table.
I tried the following code but i do not get any output. This piece of code is in a FORM statement from which i should return contents of table ITAB in the foll. code.
DATA ZS TYPE TABLE OF ADRC WITH HEADER LINE.
DATA ITAB LIKE TABLE OF BIW_KNA1_S WITH HEADER LINE.
FIELD-SYMBOLS: <FS> LIKE ITAB.
SELECT SORT1 SORT2 FROM ADRC INTO CORRESPONDING FIELDS OF TABLE
ZS WHERE ADDRNUMBER IS NOT NULL.
LOOP AT ITAB ASSIGNING <FS>.
IF ZS-ADDRNUMBER IS NOT INITIAL.
  <FS>-ZZS1 = ZS-SORT1.
  <FS>-ZZS2 = ZS-SORT2.
ENDIF.
ENDLOOP.
Since i did not get any output, I then added the foll. line of code before the LOOP statement.
SELECT * FROM BIW_KNA1_S INTO CORRESPONDING FIELDS OF TABLE ITAB
WHERE KUNNR IS NOT NULL.
When i execute this, i get the foll. error.
"BIW_KNA1_S is not defined in the ABAP dictionary as table, projection view or database view."
How to extract data from a structure BIW_KNA1_S using a SELECT statement.
Could someone help.
Thanks

Answer 1

Hi Roberto,
Ok. Let me explain my requirement more clearly. I don't want to write the code in include ZXRSAU02. In ZXRSAU02, i will have only PERFORM statement which will call the FORM statement depending on the name of the program.
Ex: PERFORM form_name ...tables i_t_data.
In this way, i don't need to make any changes in this file. I will only need to make the changes in the report where my Actual FORM code resides. In the ABAP report, i will have my FORM code which will return contents.
And this is the code which my FORM report will consist:
DATA ZS TYPE TABLE OF ADRC WITH HEADER LINE.
DATA ITAB LIKE BIW_KNA1_S OCCURS 10 WITH HEADER LINE.
FIELD-SYMBOLS: <FS> LIKE ITAB.
SELECT SORT1 SORT2 FROM ADRC INTO CORRESPONDING FIELDS OF TABLE ZS WHERE ADDRNUMBER IS NOT NULL.
LOOP AT ITAB ASSIGNING <FS>.
IF ZS-ADDRNUMBER IS NOT INITIAL.
  <FS>-ZZS1 = ZS-SORT1.
  <FS>-ZZS2 = ZS-SORT2.
ENDIF.
ENDLOOP.
But as you said, i will have some problems i suppose. Like if my ADRC has some 70 records and if there are 100 records in BIW_KNA1_S, then when i try to copy the fields from ADRC into ITAB (BIW_KNA1_S) i might have problems. I will get back to you once i clarify these things.
Thanks for your reply.