How to delete partner function in CRM BADi DETERMINATION_ADD_IN_1

Hi All,

Currently I have a requirement to delete one of the existing partner functions from CRM Service Request in BADi COM_PARTNER_BADI, But I could not able to delete it, please help, I am using the following code, please let me know If I am missing any parameter.

* prepare input_field STRUCTURES for CRM_ORDER_MAINTAIN
           REFRESH:lt_input_fields_tmp,lit_partner.
           CLEAR:ls_input_field_names,ls_input_field.
           ls_input_field_names-fieldname   = 'PARTNER_FCT'.
           ls_input_field_names-changeable  = 'X'.
         INSERT ls_input_field_names INTOTABLE ls_input_field-field_names.

*populate the input field for partner structure for crm_order_maintain
           ls_input_field-ref_handle  =   '0'.
           ls_input_field-ref_guid    =   is_partner_control-document_id.
           ls_input_field-ref_kind    =   'A'.
           ls_input_field-objectname  =   'PARTNER'.
           CONCATENATE'0000''00000001' l_partner_no INTO ls_input_field-logical_key.

           INSERT ls_input_field INTOTABLE lt_input_fields_tmp.

*Populate PARTNER structure
        wa_partner-ref_guid           =   is_partner_control-document_id.
           wa_partner-ref_kind           =   'A'.
           wa_partner-ref_partner_handle =   '0001'.
           wa_partner-kind_of_entry      =   'B'.
           wa_partner-ref_partner_fct    =   '00000001'.
           wa_partner-ref_partner_no     =  l_partner_no.
           wa_partner-ref_no_type        =   'BP'.
           wa_partner-ref_display_type   =   'BP'.
           wa_partner-partner_no         = l_partner_no.
           wa_partner-display_type       =   'BP'.
           wa_partner-no_type            =   'BP'.
        wa_partner-partner_guid       =   is_partner_control-document_id.
           wa_partner-error_flag         =   'X'.
           INSERT wa_partner INTOTABLE lit_partner.

using the following both function modules:

1) When I use CRM_ORDER_MAINTAIN, Iam getting short dump
CALL FUNCTION'CRM_ORDER_MAINTAIN'
             EXPORTING
               it_partner        = lit_partner
             CHANGING
               ct_input_fields   = lt_input_fields_tmp
             EXCEPTIONS
               error_occurred    = 1
               document_locked   = 2
               no_change_allowed = 3
               no_authority      = 4
               OTHERS            = 5.
         ENDIF.

2) not getting short dump, but Partner function is not being deleted
CALL FUNCTION'CRM_PARTNER_MAINTAIN_MULTI_OW'
             EXPORTING
               it_partner_com            = lit_partner
               iv_ref_guid               = l_ref_guid
               iv_ref_kind               = 'A'
               is_partner_control        = is_partner_control
             CHANGING
               ct_input_fields           = lt_input_fields_tmp
             EXCEPTIONS
               error_occurred            = 1
               OTHERS                    = 2.

Regards

RK