Re: BDC code - Delete Customer Fax number

PERFORM bdc_dynpro      USING 'SAPMF02D' '0401'.

PERFORM bdc_field       USING 'BDC_CURSOR'

                                'KNA1-TELFX'.

PERFORM bdc_field       USING 'KNA1-TELFX'

                                ' '.

PERFORM bdc_field       USING 'BDC_OKCODE'

                                '=UPDA'.

please try above code i think it will solve your query