Hi,
solved myself.
I have called READ_ENTITY_DATA_ALL from IO_MODEL parameter and then I have read the LT_MESSAGE tables. Then I have done some field-symbols assignements and that's all.
Here are some code:
CALL METHOD io_model->read_entity_data_all
EXPORTING
i_fieldname = 'BP_HEADER'
if_active = ''
i_crequest = id_crequest
* it_sel =
* it_entity_filter =
IMPORTING
et_message = lt_messages
et_data_entity = lt_entity.
APPEND LINES OF lt_messages TO et_message.
READ TABLE lt_entity INTO wa_entity WITH KEY usmd_entity_cont = 'BP_ROLE'.
IF sy-subrc = 0.
ASSIGN wa_entity-r_t_data->* TO <lt_anydata_role>.
ENDIF.
READ TABLE lt_entity INTO wa_entity WITH KEY usmd_entity_cont = 'BP_CENTRL'.
IF sy-subrc = 0.
ASSIGN wa_entity-r_t_data->* TO <lt_anydata_centrl>.
ENDIF.
...
Regards,
Jordi