Extend Idoc INVOIC02 - E1EDKA1 - Syntax error

Question

Hi All,
I have extended Basic idoc “INVOIC02” and using exit “EXIT_SAPLVEDF_002” to extend custom segment. I am trying to add a custom segment under “E1EDKA1”. In program I am inserting ‘Z1’ segment after parent segment “E1EDKA1”. I am passing Parent segment reference (INT_EDIDD-PSGNUM) and hierarchy level of custom (INT_EDIDD-HLEVEL) segment. Problem is custom segment still placed under root segment after “E1EDKA1” segment, which is incorrect.  Idoc error with status ‘26’ – Syntax error. Can any one tell me what I am doing wrong or how do I manage to get custom segment under parent segment “E1EDKA1”, so that I don’t get this error. Below code for your reference. Thanks in advance.
Regards,
Tim
Program -
"ZXEDFU02" -
describe table INT_EDIDD lines gv_indes.
read table INT_EDIDD index gv_indes.
if sy-subrc eq 0.
  if INT_EDIDD-segnam eq co_e1edka1 and
     INT_EDIDD-sdata+0(3) eq 'ZM'.
Now INSERT segment Idoc value and custom extend field
    if not gv_email is initial.
            INT_EDIDD-PSGNUM = gv_indes.
            INT_EDIDD-HLEVEL = '03'.
      move: co_z1edka1        to INT_EDIDD-SEGNAM,
            'email address'   to INT_EDIDD-SDATA.
      append INT_EDIDD.
    endif.
  endif.
endif.

Answer 1

Your logic looks ok.  I would remove the code to populate the parent segment number and hierarchy level.  SAP will determine those on its own.
As for the result you are seeing, if there is a syntax error on an IDoc, the entire hierarchy will be lost so the fact that the custom segment is showing up at the same level as its parent doesn't mean that is actually causing the syntax error.
Did you add your extension in the partner profile?
Program -
"ZXEDFU02" -
describe table INT_EDIDD lines gv_indes.
read table INT_EDIDD index gv_indes.
if sy-subrc eq 0.
if INT_EDIDD-segnam eq co_e1edka1 and
INT_EDIDD-sdata+0(3) eq 'ZM'.
Now INSERT segment Idoc value and custom extend field
if not gv_email is initial.
INT_EDIDD-PSGNUM = gv_indes.
INT_EDIDD-HLEVEL = '03'.
move: co_z1edka1 to INT_EDIDD-SEGNAM,
'email address' to INT_EDIDD-SDATA.
append INT_EDIDD.
endif.
endif.
endif.