ORA-22275: invalid LOB locator specified

Question

Hello,
I use Oracle 11.2.0.3. APEX 4.2.2... Listener 2.0.3 .... Glassfish server 4.0.
When I run this procedure ( that is used in this tutorial )
I get ORA-22275: invalid LOB locator specified.
The error persists over Glass fish 3.0.2, Listener 2.0.1 and 2.0.2.
Also, I installed this patch 16803775, but to not avail.
declare
        v_mime  VARCHAR2(48);
        v_length  NUMBER;
        v_file_name VARCHAR2(2000);
        Lob_loc  BLOB;
BEGIN
        SELECT MIMETYPE, CONTENT, filename,DBMS_LOB.GETLENGTH(content)
                INTO v_mime,lob_loc,v_file_name,v_length
                FROM image
                WHERE id = 70;
                 htp.init;
              -- set up HTTP header
                    -- use an NVL around the mime type and
                    -- if it is a null set it to application/octect
                    -- application/octect may launch a download window from windows
                    owa_util.mime_header( nvl(v_mime,'application/octet'), FALSE );
                -- set the size so the browser knows how much to download
                htp.p('Content-length: ' || v_length);
                -- the filename will be used by the browser if the users does a save as
                htp.p('Content-Disposition:  attachment; filename="'||replace(replace(substr(v_file_name,instr(v_file_name,'/')+1),chr(10),null),chr(13),null)|| '"');
                -- close the headers  
                owa_util.http_header_close;        
                owa_util.http_header_close;
                -- download the BLOB
                wpg_docload.download_file( Lob_loc );
end  ;
Any help pls, in getting that procedure works ?
Regards,
Fateh

Answer 1

replace this statement
select empty_clob() into c_xml from dual for update;
with
dbms_lob.createtemporary(c_xml, TRUE);