Multiple file download issues

Question

Hi All,
I have designed an APEX application to download multiple files. I have check box in each row of the file name and a download button.
When the users checks set of checkboxes and click on the "Download" Button, i am expecting the marked files to be downloaded. I am encountering the below issues in this implementation(i.e single file download is fine):
1. When ticks all the check boxes and click download, the files are never downloading. The target URL goes something like this :
www.example.com/abc/bcd/wwv_flow.accept
and there is a cross icon in the new page. No download happening.
2. When ticks few files and leave rest of the files un-checked, there are either junk charactes in target page (or) only the last checked box file alone downloading.
Please refer the code below and advice. Thanks very much in advance.
Code:
=====
declare
check_box_val varchar2(500):=' ';
file_name varchar2(500):=' ';
begin
for i in 1..htmldb_application.g_f01.count
loop
check_box_val:=nvl(htmldb_application.g_f02(i),' ');
if(check_box_val<>' ') then
sho_pdf(check_box_val);
end if;
end loop;
exception
when others then
null;
end;
sho_pdf.sql
========
CREATE OR REPLACE PROCEDURE FDM_UAT14.sho_pdf(p_file in varchar2)
AS
l_blob BLOB;
l_bfile BFILE;
BEGIN
DBMS_LOB.createtemporary (l_blob, TRUE, DBMS_LOB.SESSION);
l_bfile := BFILENAME ('UPDOWNFILES_DIR', p_file);
DBMS_LOB.fileopen (l_bfile);
DBMS_LOB.loadfromfile (l_blob, l_bfile, DBMS_LOB.getlength (l_bfile));
DBMS_LOB.fileclose (l_bfile);
OWA_UTIL.mime_header ('application/octet',
bclose_header => FALSE);
HTP.p ('Content-length: ' || DBMS_LOB.getlength (l_blob));
HTP.p( 'Content-Disposition: filename="' || p_file || '"' );
OWA_UTIL.http_header_close;
WPG_DOCLOAD.download_file (l_blob);
DBMS_LOB.freetemporary (l_blob);
EXCEPTION
WHEN OTHERS
THEN
NULL;
END;
/

Answer 1

I have read that "patch number 8548651" need to be applied in order to download multiple files in Single Page. Is it true? Pls refer this page :
http://dgielis.blogspot.com/2010/01/oracle-application-express-patch-set.html
8555172 -- BLOB download links are incorrect when multiple file items referenced on a page.