Why cant we used sy-subrc in loop and endloop?why?where exactly it is used

hi
can u help me for this

sure you can use sy-subrc inside a loop, for example for checking READ statement inside the loop.
Checking sy-subrc (return code) is done to determine is 'something' was successfull (return code = 0) or not (return code <> ).

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Why cant we use sy-index in loop and endloop?where exactly we used sy-index

hi
can u help me for this

Hi...
Genereally Sy-index is used in iterative cases like
while....endwhile
and
Do.... Enddo
In LOOP ..... Endloop.... We should use SY-TABIX....
It would be more consistent we use sy-tabix as we loop at internal table so this SY-TABIX points to the current record its reading...
we can use sy-index but rarely depends on condition.....
SY-INDEX and SY-TABIX will not be same always in LOOP and ENDLOOP
Rewards points if satisfied..
Regards
Narin Nandivada

Urgent - I have written select query between loop and endloop, Ple help out

Can any one help out me on this select query. I have written select query between loop and endloop. When I execute the program it will take too much time in this query. Please help me out. Its very urgent.
LOOP AT l_i_invoices ASSIGNING <l_invoices>.
      CLEAR alv_wa.
      alv_wa-bukrs = <l_invoices>-bukrs.
      alv_wa-gsber = <l_invoices>-gsber.
      CLEAR l_instid.
      CONCATENATE <l_invoices>-belnr <l_invoices>-gjahr INTO l_instid.
      SELECT top_wi_id FROM sww_wi2obj INTO TABLE l_i_swwwihead
              WHERE catid   = c_catid_business_object
                AND instid = l_instid
                AND typeid = c_typeid_invoice
                AND removed = space
                AND ( wi_rh_task = c_task_buyer_message
                   OR wi_rh_task = c_task_buyer_message2 ).
      IF sy-subrc = 0.
        <l_invoices>-flag = 'X'.
      ELSE.
        <l_invoices>-flag = ' '.
      ENDIF.
      MODIFY l_i_invoices FROM <l_invoices> TRANSPORTING flag
                            WHERE belnr = <l_invoices>-belnr
                               AND gjahr = <l_invoices>-gjahr.
      APPEND alv_wa TO i_alv.
    ENDLOOP.
Thanks in advance.

Here is a way to solve this problem.
Choose somewhere before this loop processing to use that select. Therefore, you'll need use FOR ALL ENTRIES <that_loop_table> clause, and in the WHERE condition you need to specify that same fields.
This way, you will have an internal table with all data you'll need to check.
Then, inside your loop statement, use the READ TABLE command with the clause WITH KEY field = value, to read that record and use the value found.
Like this sample:
SELECT bukrs lifnr umsks umskz augdt augbl zuonr gjahr belnr buzei
         waers xblnr blart gsber ebeln zfbdt zbd1t zlsch
INTO TABLE tg_bsak
FROM bsak
FOR ALL ENTRIES IN tl_bkpf_sel
WHERE bukrs EQ tl_bkpf_sel-bukrs AND
        lifnr IN s_lifnr AND
        augbl EQ tl_bkpf_sel-belnr.
LOOP AT tg_bseg INTO wa_bseg.
    READ TABLE tg_bsak INTO wa_bsak WITH KEY bukrs = wa_bseg-bukrs
                                             gjahr = wa_bseg-gjahr
                                             belnr = wa_bseg-belnr
                                             BINARY SEARCH.
if sy-subrc = 0.
* do something
endif.
ENDLOOP.

How to write select statement before the loop and how to use read statemnt

Hi,
Recently our system has changed from 4.6 to ECC6.
As its migrated its showing lots of errors like in between loop and endloop there should be no select statemnt........
Can any one please tell how to write that coding in ECC6 , how can i change the code......
In between loop and endloop i am having lots of select statemnts.....ple tell thye coding how can i select before the loop starts and
how to read that internal table in loop.

Hi Deepthi,
You can do as per below:
1) Select the required entries from the tables you need (VBAK, VBAP, KNA1, etc)
SELECT VBELN ERDAT KUNNR
    into table it_vbak
    from VBAK
where VBELN = S_VBELN. "Selection criteria
If sy-subrc = 0.
SELECT VBELN POSNR MATNR
    into table it_vbap
    from VBAP
for all entries in it_vbak
where VBELN = it_vbak-vbeln
SELECT KUNNR NAME1
    into table it_vbak
    from VBAK
where VBELN = it_vbak-vbeln.
endif.
2) Loop at the entries, and read internal table it-kna1 for customer info.
Loop at it_vbak into wa_vbak.
read table it_kna1 into wa_kna1 with key kunnr = wa_vbak-kunnr.
if sy-subrc = 0.
endif.
loop at it_vbap into wa_vbap where vbeln = wa_vbak-vbeln.
endloop.
endloop.
This is the basic idea and short example of how to extract entries and read internal table.
Hope this helps.
Regards,
Patrick

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I have a number of guitar riffs in a project that I've been making into loops, as I wish to use these as ideas which I arrange in a new project. I've been saving the edited regions of the riffs by going to Region>Add To Apple Loops Library> and saving it as a loop, which is supposed to conform to tempo as stated. These are a blue icon with a little soundwave icon in it.
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Why cant we used sy-subrc in loop and endloop?why?where exactly it is used

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