If this error occurs:

This can come from an error parameters when calling the function SO_NEW_DOCUMENT_SEND_API1.

" Destinataires --------------------------------------------------------------
REFRESH lt_receivers.
CLEAR : lst_receiver.
lst_receiver-receiver = imp_idoc_type-receiver.
lst_receiver-rec_type = imp_idoc_type-rec_type.
APPEND lst_receiver TO lt_receivers.
 
" Envoi du mail --------------------------------------------------------------
CALL FUNCTION 'SO_NEW_DOCUMENT_SEND_API1'
  EXPORTING
    document_data              = lst_sodocchgi1
    document_type              = 'HTM'
  TABLES
    object_content             = chg_content
    receivers                  = lt_receivers
  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.
" Ne pas oublier le commit !
IF sy-subrc = 0.
  COMMIT WORK AND WAIT.
ELSE.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
          WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.

Possible values for receiver and rec_type are:

A crash occurs:

• if we put a distribution list with the B code
• if the distribution list does not exists