Send PDF As Attachment

*---Function module to send mail to Recipients
        CALL FUNCTION 'SO_DOCUMENT_SEND_API1'
          EXPORTING
            document_data              = w_document_data
            put_in_outbox              = 'X'
            sender_address             = 'mariana.novelia@gmail.com'
            sender_address_type        = 'INT'
            commit_work                = 'X'
          TABLES
            packing_list               = t_packing_list
            contents_bin               = t_attach
            contents_txt               = t_body_msg
            receivers                  = t_reclist
          EXCEPTIONS
            too_many_receivers         = 1
            document_not_sent          = 2
            document_type_not_exist    = 3
            operation_no_authorization = 4
            parameter_error            = 5
            x_error                    = 6
            enqueue_error              = 7
            OTHERS                     = 8.
        IF sy-subrc NE 0.
        ELSE.
          COMMIT WORK AND WAIT.
        ENDIF.

with declare :

"Internal Tables

"Types
TYPES:
    t_document_data  TYPE  sodocchgi1,
    t_packing_list   TYPE  sopcklsti1,
    t_body_msg       TYPE  solisti1,
    t_receivers      TYPE  somlreci1,
    t_pdf            TYPE  tline.

DATA :
    t_document_data  TYPE STANDARD TABLE OF t_document_data,
    t_packing_list   TYPE STANDARD TABLE OF t_packing_list,
    t_body_msg       TYPE STANDARD TABLE OF t_body_msg,
    t_receivers      TYPE STANDARD TABLE OF t_receivers,
    t_pdf            TYPE STANDARD TABLE OF t_pdf.