SELECT ALL/ DESELECTALL - Giving ERROR. How to disable it or catch its evnt

Question

Hello,
          For the multiselect table view, I see a SELECTALL/DESELECTALL icon at the top left. I am not able to collect its event. I put a breakpoint in On input processing but it never goes there. When I click it...It gives a error message as:
500 SAP Internal Server Error
Error message: Access not possible using 'NULL' object reference. ( type of termination: RABAX_STATE )
Here is my table view. 
     <htmlb:tableView  id                   = "TV5"
                headerText           = "Requests"
                headerVisible        = "true"
                design               = "alternating"
                fillUpEmptyRows      = "false"
               onHeaderClick        = "MyEventHeaderClick"
               onRowSelection       = "MyEventRowSelection"
               selectionMode        = "MULTISELECT"
               table                = "<%= t_data %>" >
        </htmlb:tableView>
Could anyone help me how to catch event for this or how this error can be supressed.
Thanks
PK

Answer 1

I found out the solution.  Below is what I did. Hope this should help anyone looking similar issue.
Include the below in the <htmlb:tableView > section.
selectedRowIndexTable = "<%= t_selectedRowIndexTable %>"
Page attributes:
Declare : t_selectedRowIndexTable type int4_table.
On input processing:
  CLASS cl_htmlb_manager DEFINITION LOAD.
  DATA event TYPE REF TO if_htmlb_data.
  DATA: tv          TYPE REF TO cl_htmlb_tableview,
        table_event TYPE REF TO cl_htmlb_event_tableview.
    tv ?= cl_htmlb_manager=>get_data( request = request
                                    name    = 'tableView'
                                    id      = 'TVX' ).
    IF tv IS NOT INITIAL.
      table_event = tv->data.
      CLEAR t_selectedrowindextable.
      t_selectedrowindextable = table_event->prevselectedrowindextable.
      IF table_event->event_type EQ
cl_htmlb_event_tableview=>co_row_selection.
        READ TABLE t_selectedrowindextable WITH KEY table_line =
table_event->row_index TRANSPORTING NO FIELDS.
        IF sy-subrc EQ 0.
          DELETE t_selectedrowindextable INDEX sy-tabix.
        ELSE.
          FIELD-SYMBOLS <i> TYPE i.
          APPEND INITIAL LINE TO t_selectedrowindextable ASSIGNING <i>.
          <i> = table_event->row_index.
        ENDIF.
      ENDIF.
    ENDIF.