How to capture changed data at ALV screen

Hi ALV Experts,
I am using Following method for ALV display :-
CALL METHOD g_alv_grid_0200->set_table_for_first_display
    EXPORTING
      i_bypassing_buffer            = 'X'
      is_layout                          =
      it_toolbar_excluding          =
    CHANGING
      it_outtab                          =
      it_fieldcatalog                   =
CALL METHOD g_alv_grid_0200->set_ready_for_input
    EXPORTING
      i_ready_for_input = '1'.
Now I am changing few values in ALV screen and capturing through following Method :-
CALL METHOD g_alv_grid_0200->check_changed_data
    IMPORTING
      e_valid = l_valid.
THIS ABOVE METHOD STRANGELY CAPTURES CHANGES IN QUANTITY AND DATE FIELDS ONLY AND NOT IN CHARATER FIELDS.
Can somebody suggest how to capture changes of character fields also.
Thanks in Advance,
Chandan

Hi,
Check whether the following logic helps.
p_er_data_changed TYPE REF TO cl_alv_changed_data_protocol.
DATA :
    lwa_mod_cell TYPE lvc_s_modi,
    lwa_mod      TYPE ty_mod.
LOOP AT p_er_data_changed->mt_good_cells INTO lwa_mod_cell.
    lwa_mod-row = lwa_mod_cell-row_id.
    APPEND lwa_mod TO i_mod.
ENDLOOP.
Regards,
Lohitha

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