AT commands in abap

hi experts,
i m new to abap.
i've created an internal table of type LFA1 in which i've selected the data for column LIFNR NAME1 ORT01. i've to calculate total no. of cities.
i've written the following code:
sort it_lfa1.
loop at it_lfa1.
at new ort01.
count = count + 1.
endat.
endloop.
but i find in debugger that the control passes every time through at new statement and hence count gets every time incremented and not at new city (ORT01). in this case i've to take the dictionary type LFA1 and i can't create my local type so that i can pass to smartform. neither at new nor at end of is working.
plz help.

Hi Annie,
When you use at new ort001, here in your itab, ORT01 is the third field. At new does consider the fields that are left to column ORT01. Hence evreytime it goes into the at new statement as fields that are left to ORT01 might be changing.
You can have ORT01 as first filed and count the number of cities.
Also have a look at below link.
http://www.sts.tu-harburg.de/teaching/sap_r3/ABAP4/at_itab.htm
I hope it helps.
Best Regards,
Vibha
*Please mark all the helpful answers

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<removed_by_moderator>
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> So please can u help me how to call a unix command from ABAP.
I was about to help you.
>it is very urgent.
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