SAPUI5: To much error messages

Hi,

i use oData and therefore create an error like this:

DATA: lo_exception TYPE REF TO /iwbep/cx_mgw_busi_exception,

            lo_container TYPE REF TO /iwbep/if_message_container.


      lo_container = mo_context->get_message_container( ).


        lo_container->add_messages_from_bapi(

          EXPORTING

            it_bapi_messages          = lt_return

*              iv_error_category         =

                iv_determine_leading_msg  = abap_true

                iv_entity_type            = iv_entity_name

                it_key_tab                = it_key_tab

                iv_add_to_response_header = abap_true

        ).





      CREATE OBJECT lo_exception

        EXPORTING

*         textid      =

*         previous    =

         message_container      = lo_container

*         http_status_code = '500'

*         http_header_parameters =

*         sap_note_id =

*         msg_code    =

*          entity_type = iv_entity_name

*          message     = 'Konnte nicht gespeichert werden!'

*         message_unlimited      =

*         filter_param     =

*         operation_no     =

        .


      RAISE EXCEPTION lo_exception.

but i always get more error-messages then i supose to get:

only the one in the middle is the error i added.