Paramform=yes and Rep-52007

Question

I have forms and report services 10.2.0.2 installed on my Win2003 server.
Reports runs perfectly with paramform=no but when i use paramform=yes it show html param form but pressing submit query it show The page cannot be displayed page. the same report with paramform=no and hard coding paramter runs perfectly.
This is the procedure i am using after adding hidden_action i start getting REP-52007 instead of the page cannot be displayed.....
PROCEDURE show_report(pRptServer varchar2,pRptObj varchar2,pRptFormat varchar2,pRptPath varchar2,pRptParameter varchar2,pParamForm varchar2) IS
repid REPORT_OBJECT;
rep_status varchar2(30);
v_rep VARCHAR2(100);
vjob_id varchar2(100);
v_reportserver varchar2(50):=pRptServer;
v_runformat varchar2(50):= pRptFormat;
hidden_action varchar2(1000);
v_report_other VARCHAR2(4000) :='';
begin
repid := FIND_REPORT_OBJECT(pRptObj);
SET_REPORT_OBJECT_PROPERTY(repid,REPORT_FILENAME,pRptPath);
SET_REPORT_OBJECT_PROPERTY(repid,REPORT_COMM_MODE,SYNCHRONOUS);
SET_REPORT_OBJECT_PROPERTY(repid,REPORT_DESTYPE,CACHE);
SET_REPORT_OBJECT_PROPERTY(repid,REPORT_SERVER,v_reportserver);
SET_REPORT_OBJECT_PROPERTY(repid,REPORT_DESFORMAT,v_runformat);
--SET_REPORT_OBJECT_PROPERTY(repid,REPORT_OTHER,pRptParameter||' paramform='||pParamForm);
-- code for pfaction
hidden_action := hidden_action ||'&report='||GET_REPORT_OBJECT_PROPERTY(repid,REPORT_FILENAME);
hidden_action := hidden_action ||'&destype='||GET_REPORT_OBJECT_PROPERTY(repid,REPORT_DESTYPE);
hidden_action := hidden_action ||'&desformat='||GET_REPORT_OBJECT_PROPERTY(repid,REPORT_DESFORMAT);
hidden_action := hidden_action ||'&userid=' ||GET_APPLICATION_PROPERTY(username)||'/'||GET_APPLICATION_PROPERTY(password)||'@'||GET_APPLICATION_PROPERTY(connect_string);
hidden_action := hidden_action ||'&'||v_report_other;
SET_REPORT_OBJECT_PROPERTY(repid,REPORT_OTHER,'pfaction='||hidden_action||' '||pRptParameter||' paramform='||pParamForm);
v_rep := RUN_REPORT_OBJECT(repid);
vjob_id := substr(v_rep,length(v_reportserver)+2,length(v_rep));
rep_status := REPORT_OBJECT_STATUS(v_rep);
while rep_status in ('RUNNING','OPENING_REPORT','ENQUEUED')
loop
rep_status := REPORT_OBJECT_STATUS(v_rep);
end loop;
if rep_status = 'FINISHED' then
WEB.SHOW_DOCUMENT('/reports/rwservlet/getjobid'||vjob_id||'?server='||v_reportserver||'','_blank');
message('Finished');
else
message('Error');
end if;
end;
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Answer 1

Hello,
There is an example in the document :
Oracle Forms Services – Using Run_Report_Object() to call Reports with a parameter form
http://www.oracle.com/technology/products/forms/pdf/10g/frmrepparamform.pdf
Regards