BADI in O4_Tiger of OII_DIP_ADD_COLUMNS

Question

Hi~
In present project,we need to add customer field in T-code:O4_TIGER,and then i find a badi : OII_DIP_ADD_COLUMNS.
I search the web and get the message in forums : BADI-Urgent
I copy Gabor Hornyak  's code but it's not work  as follow.
and now you need to put the value of cust1 to yy_field
in badi method SET_CUST_FIELDS
DATA: ls_tankdip TYPE roiitankdip.
LOOP AT tankdip_tab INTO ls_tankdip.
ls_tankdip-yy_field = ls_tankdip-cust1.    <<<<----error
MODIFY tankdip_tab FROM ls_tankdip.
ENDLOOP.
After i comment the error code,and i can see a customer field  named 'My new field' in O4_TIGER ,but it can't save the input value after save.
Ths.
Nicky

Answer 1

great.
just remodify the method in set_cust_field.
  DATA: ls_tankdip TYPE roiitankdip.
  DATA: l_g_tankdip_tab(29) VALUE '(SAPMOIIC_DIP)G_TANKDIP_TAB[]'.
  DATA:tank TYPE roiitankdip.
  TYPES t_roiitankdip  TYPE TABLE OF roiitankdip.
  FIELD-SYMBOLS: <fs_roiitankdip> TYPE  t_roiitankdip.
display
  IF pm_type = ''.
    LOOP AT tankdip_tab INTO ls_tankdip.
      ls_tankdip-cust1 = ls_tankdip-vbeln.
      MODIFY tankdip_tab FROM ls_tankdip.
    ENDLOOP.
  ENDIF.
modify
  IF pm_type = 'V'.
    LOOP AT tankdip_tab INTO ls_tankdip.
      IF ls_tankdip-cust1 IS INITIAL.
        ls_tankdip-cust1 = ls_tankdip-vbeln.
      ENDIF.
      ls_tankdip-vbeln = ls_tankdip-cust1.
      MODIFY tankdip_tab FROM ls_tankdip.
    ENDLOOP.
endif.
it work.
but it have a bit wrong,,when i replace the old value with blank,,it still with old value ,cos  
    IF ls_tankdip-cust1 IS INITIAL.
        ls_tankdip-cust1 = ls_tankdip-vbeln.
      ENDIF.
do you have a better way to deal it?
Ths