AJAX Memory Tree

Question

Hello,
Has anybody tried the http://www.oracle.com/technology/pub/articles/spendolini-tree.html example? On my Oracle XE for Windows it does not work...when executing the "Listing 1", I receive the "PL/SQL: Error on line 203"...and the line 203 is what follows:
for x in (select a.pid, a.id, a.name,
(select count(*) from tree_view b where
b.pid = a.id) branch_count
from tree_view a
where a.pid = v('P1_BRANCH_ID'))
loop
if(x.branch_count > 0) then
     -- There are sub-nodes - render with a +/- icon
     insert into tree_temp values(null, v('APP_USER'), v('APP_SESSION'), x.pid, x.id, x.name, 'Y', 'plus');
else
     -- This is an end-node - no need for a +/- icon
     insert into tree_temp values(null, v('APP_USER'), v('APP_SESSION'), x.pid, x.id, x.name, 'N', null);
end if;
end loop;
end expand;
Greetings,
HeCSa.

Answer 1

I've worked through the example and hit a problem. When I select an item within the tree, it appends another tree below the original tree...although it does update the current node. Has anyone has this problem?
eg
Manager
Emp1
Emp2
Emp3
click on emp2 and get
Manager
Emp1
Emp2
Emp3
Manager
Emp1
Emp2
Emp3
I had a quick look within the process_click procedure within Listing 1 and is reference to an item P1_SELECTED_FD_ID which I presume should be P1_SELECTED_NODE...although changing this didn't solve the problem.
Thought I would see if it is a general fault before I look further.