Dynamic Lov not Displaying

Hi
I am having trouble in displaying my dynamic record group. I created a default record group and LOV called RG_TRY and LOV_TRY. I based LOV_TRY on RG_TRY which is a SQL query with one column. I call this LOV by pressing a button. However, I want to change the SQL when the button is pressed. I tried this code in my KEY-LISTVAL but the LOV doesn't display anything. What am I doing wrong? I put message to see if the Recorg group is being created. It is but not displaying the LOV. Please help.
x number;
rg_name VARCHAR2(40) := 'RG_TEST';
rg_id RecordGroup;
lov_id LOV;
a_value_chosen BOOLEAN;
code_col GROUPCOLUMN;
qry varchar2(4000);
BEGIN
     rg_id := FIND_GROUP('RG_TEST');
     qry := 'SELECT NAME FROM TEST';
     IF NOT ID_NULL(RG_ID) then
          delete_group(RG_id);
     END IF;
     rg_id := CREATE_GROUP_FROM_QUERY(rg_name, qry);
     x := POPULATE_GROUP(rg_id);
     message(x);
     lov_id := FIND_LOV('LOV_TRY');
     SET_LOV_PROPERTY('LOV_TRY', GROUP_NAME, rg_name);
     message(get_lov_property('LOV_TRY', GROUP_NAME));
a_value_chosen := Show_Lov('LOV_TRY', 40, 40);
END;

Hi,
Your code works fine in a form I just made.
declare
   x                                            number;
   rg_name                                      varchar2( 40 ) := 'RG_TEST';
   rg_id                                        recordgroup;
   lov_id                                       lov;
   a_value_chosen                               boolean;
   code_col                                     groupcolumn;
   qry                                          varchar2( 4000 );
begin
   rg_id := find_group( 'RG_TEST' );
   qry := 'SELECT NAME FROM TEST';
   if not id_null( rg_id )
   then
      delete_group( rg_id );
   end if;
   rg_id := create_group_from_query( rg_name, qry );
   x := populate_group( rg_id );
   message( x );
   lov_id := find_lov( 'LOV_TRY' );
   set_lov_property(
      'LOV_TRY'
    , group_name
    , rg_name );
   message( get_lov_property( 'LOV_TRY', group_name ) );
   a_value_chosen := show_lov(
                       'LOV_TRY'
                     , 40
                     , 40 );
end;And you get no error messages? And you see all messages appear on the message bar?
In that case I have no clue.
Grtx,
Remco

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