'bobj.crv.params.FlexParameterUI' is null or not an object

Question

I'm having a problem getting my report to display in the DHTML viewer.<br>
<br>
My test environment:<br>
- Windows XP SP3<br>
- Tomcat 5.5 with JDK 1.6.0_17<br>
- PostgreSQL 8.4 (Windows version)<br>
- Report designed using JDBC driver - postgresql-8.4-701.jdbc3.jar<br>
- I'm not using Eclipse or the reporting tag libraries (just Notepad)<br>
<br>
I can get my report with saved data to work just fine in the DHTML viewer but I keep getting the following error every time I try to view it in the viewer:<br>
<br>
'bobj.crv.params.FlexParameterUI' is null or not an object<br>
<br>
For testing purposes, I tried the samples available and this is what my results were:<br>
<br>
1. Java_CRJ12_Web_Set_DB_Logon sample works fine.  I edited the index.html to include my report (without saved data) and it successfully generates a PDF export which it prompts me to open or save.  So this works fine and I verified the data in the PDF document.<br>
<br><br>
2. Java_CRJ12_Web_View sample fails with the error I've mentioned above.<br>
<br>
This is code I'm using<br>
jrc_view_report.jsp<br>
<%@page contentType="text/html"%>
<%//Crystal Java Reporting Component (JRC) imports.%>
<%@page import="com.crystaldecisions.sdk.occa.report.application.*" %>
<%@page import="com.crystaldecisions.sdk.occa.report.lib.*" %>
<%@page import="com.crystaldecisions.sdk.occa.report.application.DatabaseController" %>
<%
//Report can be opened from the relative location specified in the CRConfig.xml, or the report location
//tag can be removed to open the reports as Java resources or using an absolute path (absolute path not recommended
//for Web applications).
final String REPORT_NAME = "PP30_DupPayments.rpt";
%>
<%
try {
     //Open report.
     ReportClientDocument reportClientDoc = new ReportClientDocument();
     reportClientDoc.setReportAppServer(ReportClientDocument.inprocConnectionString);
     reportClientDoc.open(REPORT_NAME, 0);
     reportClientDoc.getDatabaseController().logon("postgres", "sa");
     //Store the report source in session, will be used by the CrystalReportViewer.
     session.setAttribute("reportSource", reportClientDoc.getReportSource());
     //Launch CrystalReportViewer page that contains the report viewer.
     response.sendRedirect("CrystalReportViewer.jsp");
catch(ReportSDKException ex) {     
     out.println(ex);
catch(Exception ex) {
     out.println(ex);               
%>
<br>
<br>
CrystalReportViewer.jsp<br>
<%@ page contentType="text/html; charset=utf-8"
         import="com.crystaldecisions.report.web.viewer.CrystalImageCleaner,
                 com.crystaldecisions.report.web.viewer.CrystalReportViewer,
                 com.crystaldecisions.report.web.viewer.CrPrintMode"
%><%
Object reportSource;
CrystalReportViewer crystalReportViewer;
* Retrieve ReportSource from HTTP Session and pass to CrystalReportViewer.
reportSource = session.getAttribute("ReportSource");
crystalReportViewer = new CrystalReportViewer();
crystalReportViewer.setOwnPage(true);
crystalReportViewer.setPrintMode(CrPrintMode.ACTIVEX);
crystalReportViewer.setReportSource(reportSource);
crystalReportViewer.processHttpRequest(request, response, getServletContext(), null);
%><%!
* Start image clieanup thread on JSP load.
* Scan temp folder every 10 minutes to delete viewer-generated images 20 minutes or older.
public void jspInit() {
    CrystalImageCleaner.start(getServletContext(),  10 * (60 * 1000), 20 * (60 * 1000));
* Stop the image cleanup thread on JSP unload.
public void jspDestroy() {
    CrystalImageCleaner.stop(getServletContext());
%>
<br><br>
Things I know:<br>
- web.xml appears to be configured correctly<br>
- CRconfig.xml appears to be working as well (as my PDF document looked good<br>
I'm using these crjava libraries:<br>
http://downloads.businessobjects.com/akdlm/crystalreportsforeclipse/2_0/crjava-runtime_12.2.204.zip<br>
<br>
I don't think my markup formatting came through correctly - sorry about the code format.

Answer 1

Hi Ted!
Thanks for the reply and suggestions.  I don't know if there is a different version of the viewers folder that I should be using but I am using the ones from this folder:
C:\Program Files\Business Objects\Common\4.0\crystalreportviewers12
That said, I didn't see anything amiss in Fiddler and when I looked in Firebug at the script portion where it was constructing the FlexParameterUI panel, I could see where it was capturing the report parameter names and prompts.  I decided to rip out all the parameters out of my report and voila, it loaded up fine in the viewer.
I then added a new string parameter giving it a simple short name (Test1) and, initially, I did not use this parameter in the report.  It loaded up in the viewer just fine too.
I then added the parameter to the report header and I was back to the same problem - it would not load in the viewer and the error was the same as the subject line shows.
For the record, I am using Crystal Reports 2008 v12.2.0.290
So is there some other crystalreportviewers12 that I should be using?
Kind regards,
Evan