ALV Grid im Backend sichtbar aber nicht im Webgui

Code: Alles auswählen.

REPORT ZTEST.
START-OF-SELECTION.

  SELECT * INTO TABLE @DATA(it_spfli)
    FROM spfli
    WHERE carrid = 'AA'.

  DATA(o_alv) = NEW cl_gui_alv_grid( i_parent      = cl_gui_container=>default_screen
                                     i_appl_events = abap_true ).

  DATA: osalv TYPE REF TO cl_salv_table.

  cl_salv_table=>factory( IMPORTING
                            r_salv_table = osalv
                          CHANGING
                            t_table      = it_spfli ).

  DATA(it_fcat) = cl_salv_controller_metadata=>get_lvc_fieldcatalog( r_columns      = osalv->get_columns( )
                                                                     r_aggregations = osalv->get_aggregations( ) ).


  DATA(lv_lay) = VALUE lvc_s_layo( zebra      = abap_false
                                      cwidth_opt = 'A'
                                      grid_title = 'Flg' ).

  o_alv->set_table_for_first_display( EXPORTING
                                        i_bypassing_buffer = abap_false
                                        i_save             = 'A'
                                        is_layout          = lv_lay
                                      CHANGING
                                        it_fieldcatalog    = it_fcat
                                        it_outtab          = it_spfli ).


  cl_gui_alv_grid=>set_focus( control = o_alv ).
  cl_abap_list_layout=>suppress_toolbar( ).
  WRITE: space.