Getting quantity from MIGO using field-symbols

Hello All,

I am trying to get the quantity entered(for some computation) in MIGO, before it is posted, using the code :

EXIT: EXIT_SAPLEINR_003

Include: ZXM06U47

Code:

data: m(40) type c.

types: wa_goitem type goitem.

data: lv_erfmg type erfmg.

FIELD-SYMBOLS: <wa_goitem> type wa_goitem.

clear: m, lv_erfmg.

m = '(SAPLMIGO)GOITEM'.

assign (m) to <wa_goitem>.

if sy-subrc = 0.

  lv_erfmg = <wa_GOITEM>-ERFMG.

endif.

Problem with above is, if there are more than 1 item, it is only returning the last item quantity.

I also found another table LT_XMSEG which returns all item quantity, but i'm not able to call the same using the above approach. Am i missing something ?