Converting digit into words through HR_IN_CHG_INR_WRDS..

i am using this function module in debit credit report that is linked with sap script..

data : sub_tot like bseg-wrbtr.
DATA :  lv_amt       TYPE p DECIMALS 2.
data  lv_word like spell-word.
data : lv_amount TYPE PC207-BETRG.
*data : i_value like konv-kwert.
data : lv_inwords(255) TYPE c,
tmp_amt  type TDSYMVALUE.
data : spell_fig(80).
*break-point.

data : fig1(70),
        fig2(20),
        fig3(20).
tmp_amt = sub_tot.
lv_amount = tmp_amt.


    CLEAR in_tab.
    READ TABLE in_tab WITH KEY name = 'AMOUNT'.


    CALL FUNCTION 'HR_IN_CHG_INR_WRDS'
      EXPORTING
        amt_in_num               = lv_amount
     IMPORTING
       AMT_IN_WORDS             =  lv_inwords
     EXCEPTIONS
       DATA_TYPE_MISMATCH       = 1
              .

move space to spell_fig.
split lv_inwords at 'Rupees' into fig1 fig2 .
concatenate fig1 'AND' fig2 'Only*' into spell_fig separated by space.

not getting any amount in print..also not getting any dump..

please help