FUNCTION MODULE CREATION FOR GENERIC DATA SOURCE

Question

Hi BI gurus,
I am creating function module for generic datasource. For that I followed below mentioned steps
Steps
1.     Created s structure with the fields that needed.
2. Created FM by copying the standard Function module
" RSAX_BIW_GET_DATA_SIMPLE " and Give a New name starting With
Y or Z .
3. IN SE37 ->Your Function module name -> Change, In table tab given structure
name by deleting the associated type given in “E_T_DATA “.
And inserted the required code given below
      PROGRAM 'ZHU_BALANCE'.
*& Report  ZHU_BALANCE
TABLES: VEKP, VEPO.
DATA: BEGIN OF T_DISPLAY,
      DATE   LIKE SY-DATUM,
      EXIDV  LIKE VEKP-EXIDV,
      LGORT  LIKE VEPO-LGORT,
      WERKS  LIKE VEKP-WERKS,
      END OF T_DISPLAY.
DATA: ITAB_DISPLAY LIKE TABLE OF T_DISPLAY.
DATA: WA_ITAB_DISPLAY LIKE LINE OF ITAB_DISPLAY.
SELECT VEKPEXIDV VEPOLGORT VEPO~WERKS
       INTO CORRESPONDING FIELDS OF TABLE ITAB_DISPLAY
       FROM VEKP AS VEKP INNER JOIN VEPO AS VEPO
         ON  VEKPVENUM = VEPOVENUM
         AND VEKPWERKS = VEPOWERKS
       WHERE VEKP~VSTEL = SPACE
         AND VEKP~VEGR1 = '401'
         AND VEKP~VPOBJ = '12'
         AND VEKP~STATUS = '0020'
         AND VEPO~VEPOS = '000001'.
LOOP AT ITAB_DISPLAY INTO WA_ITAB_DISPLAY.
WA_ITAB_DISPLAY-DATE = SY-DATUM.
MODIFY ITAB_DISPLAY FROM WA_ITAB_DISPLAY TRANSPORTING DATE.
ENDLOOP.
WRITE:/ 'DATE', 20 'EXIDV', 40 'LGORT', 60 'WERKS'.
ULINE.
LOOP AT ITAB_DISPLAY INTO WA_ITAB_DISPLAY.
WRITE:/ WA_ITAB_DISPLAY-DATE, 20 WA_ITAB_DISPLAY-EXIDV , 40 WA_ITAB_DISPLAY-LGORT, 60 WA_ITAB_DISPLAY-WERKS.
ENDLOOP.
While checking the function module it’s populating the syntax error as
THE TYPE “SRSC_S_IF_SIMPLE” IS UNKOWN. (Though this is commented in program)
So pls suggest
Regards,
praful

Answer 1

hi indira,
thanx for ur reply we have created the funcion module successfuly it is also showing the output correct. But when we put that function module in the generic data source and try to extract data in RSA3 it shows the correct output of function module but with the msg ' 0 entries found in customer enhancement' and therfore zero records in the display list.
is there any correction or steps to be followed in data extraction
pls suggest
regards,
praful