BDC program - avoid duplicate records

Question

Hello Experts,
I m doing BDC .My query is not working
My req is if company code,Pur Org.,A/c Grp & name1 is same as in the database i.e. if vendor having same these 4 fields in the databse as in the excel, this particular record will not get uploaded .
In it_success is the internal table with records to be uploaded after some validations.
PLz check where i m wrong
loop at i_lfa1.
    loop at i_lfb1 where lifnr = i_lfa1-lifnr.
             loop at i_lfm1 where lifnr = i_lfb1-lifnr.
               main_table-lifnr  = i_lfa1-lifnr.
               main_table-bukrs = i_lfb1-bukrs.
               main_table-ekorg = i_lfm1-ekorg.
               main_table-KTOKK = i_lfa1-KTOKK.
               main_table-name1 = i_lfa1-name1.
               append main_table.
endloop.
    endloop.
endloop.
loop at it_success.
   loop at main_table where ( bukrs = it_success-bukrs_001
                       and EKORG = it_success-EKORG_002
                       and KTOKK = it_success-KTOKK_003
                       and name1 = it_success-name1_006 ).
MOVE-CORRESPONDING it_success TO it_error.
APPEND it_error.
delete main_table.
if sy-subrc eq 0.
delete it_success.
e_fret-type = 'E'.
e_fret-name = it_error-NAME1_006.
e_fret-message = 'Vendor Name already exists '.
append e_fret.
endif.
endloop.
endloop.
Ravi
Edited by: Julius Bussche on Oct 1, 2008 9:30 AM
Please use meaningfull subject titles.

Answer 1

Hi,
loop at i_lfa1.
loop at i_lfb1 where lifnr = i_lfa1-lifnr.
read table i_lfm1 with key lifnr = i_lfb1-lifnr.
if sy-subrc = 0.
main_table-ekorg = i_lfm1-ekorg.
endif.
main_table-lifnr = i_lfa1-lifnr.
main_table-bukrs = i_lfb1-bukrs.
main_table-KTOKK = i_lfa1-KTOKK.
main_table-name1 = i_lfa1-name1.
append main_table.
endloop.
endloop.
Try Above code.
Thanks,
Durai.V