Selection issue in tree view

Question

Hi.
I have one strange issue in Z tree view. After selection of one row in tree view, I can next select only the rows the are below the selected row (doesn't matter if they are on lower or upper level). However I can't select the row that is displayed higher of the selected row.
Anyone has an idea where could be the problem?
Best regards.

Answer 1

Tnx for answering. I checked if the entity is read correctly and in on_select event I get data OK. So I pass data to collection at the end.
here is the code...
METHOD eh_onselect.
*CALL METHOD SUPER->EH_ONSELECT
**  EXPORTING
**    htmlb_event    =
**    htmlb_event_ex =
   DATA: lv_event    TYPE REF TO cl_thtmlb_tree,
         tnode       TYPE REF TO if_bsp_wd_tree_node,
         bo          TYPE REF TO if_bol_bo_property_access,
         col         TYPE REF TO if_bol_bo_col.
   TRY.
       lv_event ?= htmlb_event_ex.
       typed_context->itgroupselected->collection_wrapper->clear( )  .
       IF lv_event->row_key IS INITIAL.
         tnode = typed_context->itgroup->get_node_by_index( lv_event->row_index ).
         lv_event->row_key = tnode->node_key.
       ELSE.
         tnode = typed_context->itgroup->get_node_by_key( lv_event->row_key ).
       ENDIF.
       tnode->selected = abap_true.
       bo = typed_context->itgroup->get_bo( lv_event->row_key )    .
       CREATE OBJECT col TYPE cl_crm_bol_bo_col.
       col->add( bo ).
       typed_context->itgroupselected->set_collection( col ).
     CATCH cx_sy_move_cast_error.
   ENDTRY.
ENDMETHOD.
maybe any suggestion?