Forum OpenACS Development: Re: apm callbacks during uninstall?

I was trying to uninstall the news package, but when I run the drop script I got this error:

Database operation "0or1row" failed (exception NSDB, "Query was not a statement
returning rows.")

ERROR:  update or delete on "acs_objects" violates foreign key constraint
"acs_objects_context_id_fk" on "acs_objects" DETAIL:  Key (object_id)=(559) is
still referenced from table "acs_objects".

SQL:
select apm_package__delete('559');

It was because there were news items in the DB, so I drop them using this funtion:

create function inline_b0 ()
returns integer as '
declare
            v_item_cursor2 RECORD;
begin
RAISE NOTICE ''Entro a la funcion inline_b0()'';
    FOR v_item_cursor2 IN
        select item_id
        from news_item_revisions
    LOOP
        PERFORM news__delete(v_item_cursor2.item_id);
    END LOOP;
end;
' language 'plpgsql';

When I run this from PSQL it deletes all the items.
So I run the drop script and it worked very well, so I decided to make an Tcl
Callback, I call the function this way in the before-uninstall callback:

db_exec_plsql news_f {
  select inline_b0();
}

Then I run the "Uninstall this package from your system" option in the APM, and postgresql stalled in the funtion content_type__drop_type()

-- drop CR content_type
select content_type__drop_type(
        'news',    -- content_type
        't',      -- drop_children_p
        't'        -- drop_table_p
);

I don't know really why is this going on.

I also made a .tcl page that calls the inline_b0() function, and then I run the drop script and It went perfect.
Am I doing something wrong in the apm callback?

Thanks,

Paolo