Delete Duplicate entries in itab

Dear Experts,
My code is Below. my requirement is all the work area fields are modify comparing matnr.
but i am use append duplicates entris allowed.only possible to modify.
loop at it_ekpo into wa_ekpo.
read table it_ekpo3 into wa_ekpo3 with key matnr = wa_ekpo-matnr.
if sy-subrc = 0.
wa_ekpo-matnr = wa_ekpo3-matnr.
wa_ekpo-menge = wa_ekpo3-menge.---->count field
modify it_ekpo from wa_ekpo.
endif.
endloop.
sort it_ekpo.
DELETE adjacent DUPLICATES FROM it_ekpo comparing matnr.
(Duplicates entry is not working) so modify is changed.
reference: -
>it_ekpo in this way
ebeln matnr menge ecp
10 lo45 1 iiii
10 l045 1 uuy
10 lo77 1 hhj
13 li12. 1 jhjh [mainly i join one itab ibn it_ekpo]
reference------>it_ekpo3.
ebeln matnr menge
10 lo45 2
10 lo77 1
13 li12 1
my final output is --->it_ekpo in this way.
ebeln matnr menge ecp
10 lo45 2 iiii
10 lo77 1 hhj
13 li12. 1 jhjh
<removed_by_moderator>
regards,
raj.
Edited by: Julius Bussche on Dec 11, 2008 5:30 PM

sort it_ekpo by matnr.
not
sort it_ekpo.

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Delete duplicate entries

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http://help.sap.com/saphelp_nw04/helpdata/en/06/aafd54fc4011d195280000e8353423/content.htm
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 |ALL FIELDS].
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>
Pavan Sanganal wrote:
>   DELETE ADJACENT DUPLICATES FROM IT_KOSTL COMPARING KOSTL hours.
> Why the line 3 is still present in the table?
>
> I hope as per that syntax, this line too should get delete.... Is it right?
>
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