Cannot navigate to the elements of a T-list populated at runtime

Question

I'm populating a T-list dynamically at runtime using a query. The list gets populated without any error at runtime. I'm using the following program unit to populate the list :
DECLARE
v_recsql Varchar2(1000); -- The SQL for creating the Record Group.
v_recgrp RecordGroup; -- Record Group
v_status Number; -- Return Value of Populate_Group function.
BEGIN
v_recsql := 'SELECT setup_code, description
FROM setup_types
WHERE organization_id = :parameter.org_id
ORDER BY setup_code';
-- Create the Record Group
v_recgrp := CREATE_GROUP_FROM_QUERY('v_recgrp', v_recsql);
IF NOT ID_NULL(v_recgrp)
THEN -- No Error, record group has been successfully created.
-- Populate Record Group
v_status := POPULATE_GROUP('v_recgrp');
IF v_status = 0
THEN -- No Error. Record Group has been Populated.
POPULATE_LIST('b_res_setups.setup_code', 'v_recgrp');
message('Populated the list successfully');pause;
END IF; -- IF v_status = 0
-- Delete the Record Group as it is no longer needed.
DELETE_GROUP('v_recgrp');
END IF; -- IF NOT ID_NULL(v_recgrp)
END;
The problem is when i use the above program unit, then after populating the T list i'm unable to navigate to any element of my choice using the mouse. The focus returnes to the first element everytime i click any other element.
My query is :
v_recsql := 'SELECT description, setup_code
FROM setup_types
WHERE organization_id = :parameter.org_id
ORDER BY setup_code'
But when i use the following query to populate the record group there's no problem.
v_recsql := 'SELECT description, setup_code
FROM setup_types
WHERE organization_id = :parameter.org_id
ORDER BY setup_code'
In the table setup_types the column setup_code is a not null column i.e. it cant have null values, whereas the column description can have null values.
Please help,
Abhishek.

Answer 1

There is unique constraint or index on SETUP_CODE column?
Probably, the list contains duplicated values.