Facing a strange issue

Question

I am calling jasper reports.. from a button..
But what i observe is after clickign the button the code which exist in a different page fires twice..
Previously itused to fire only once now twice..what can be the reason for it. . am i doing something wrong
Some one please help me trouble shoot .Version apex 4 oracle db 11g xe.
Button is a template bassed button it is redirected to page 7
and in page 7 this code gets executed twice..
why should it get executed twice that is the mystrey  i am trying to solve..
begin
warn('firedsuprise');
intro_letterm(1,:p200_subscribe_no,'paul',:p200_magazine_no);
end;
create or replace
procedure intro_letterm (mprocno number,msubscribe_no number,muserid varchar2,mmagazine_no number) is
l_blob BLOB;
l_mime_type VARCHAR2 (100);
begin
warn('suprise');
--xlog ('PRC_GET_REPORT_TUNNEL', 'url (orig):' || 'http://localhost:84/JasperReportsIntegration/report?_repName=test_repFormat=pdf_dataSource=def1_outFilename=tes.txt_repLocale=de_DE,repEncoding=UTF-8');
xlib_jasperreports.set_report_url ('http://'||rserver()||'/JasperReportsIntegration/report');
update subscribers set intro_letter = 'Y' ,intro_date = sysdate where subscribe_no = msubscribe_No and magazine_no = mmagazine_no;
xlib_jasperreports.get_report
(p_rep_name => 'sintrochess',
p_rep_format => 'pdf',
p_data_source => 'chess',
p_rep_locale => 'de_DE',
p_rep_encoding => 'UTF-8',
p_additional_params =>'&Psubscribe_no='||msubscribe_no||'&Pmagazine_no='||mmagazine_no,
p_out_blob => l_blob,
p_out_mime_type => l_mime_type
OWA_UTIL.mime_header (ccontent_type => l_mime_type,
bclose_header => FALSE);
-- set content length
HTP.p ('Content-length: ' || DBMS_LOB.getlength (l_blob));
OWA_UTIL.http_header_close;
-- download the file and display in browser
WPG_DOCLOAD.download_file (l_blob);
WPG_DOCLOAD.download_file (l_blob);
BLOB_LOADB (mid(),msubscribe_no,mprocno,'SINTROLETTERM','subintro'||msubscribe_no,l_mime_type,l_blob);
-- release resources
DBMS_LOB.freetemporary (l_blob);
-- stop rendering of APEX page
apex_application.g_unrecoverable_error := TRUE;
EXCEPTION
WHEN OTHERS
THEN
xlog ('PRC_GET_REPORT_TUNNEL', SQLERRM, 'ERROR');
RAISE;
END;
any one has any idea on this there is a button i click on it.. so as to generate a pdf file
It calls a page.. and the procedure is called from on load before header process
If i dont add the following plsql this code executes only once..
bUT THE Moment i add this code. the code gets executed twice..
begin
warn('firedsuprise');
intro_letterm(1,:p200_subscribe_no,'xyzl',:p200_magazine_no);
end;
The following had been added earlier ..Why should this happen
One more observation if i remove the jasper related code from intro letterm procedure then the code executes only one time..
any one has answer on this ??? Please let know
I didnt understand how the code is able to go reverse and execute 2 times.quite strange
Edited by: zycoz100 on Oct 15, 2012 11:20 PM
Edited by: zycoz100 on Oct 19, 2012 7:21 AM

Answer 1

any one any idea on this.. please shall be appreciated..
Thanks again,