Unable to refresh the data on a cached report.

Question

Hi,
I am using the CR4E component on a Tomcat server.
I am having real difficulty to getting a cached report to refresh. Basically when the report is first displayed it is okay, then some further data is added to the database, and when the report is redisplayed (with the same parameters) it is still displaying the cached information. This is specific for the subreports. I basically always want my reports to refresh when they are displayed.
I know this must be simple but I just can't get to work, or find any example code.
I have tried a couple of options:
Option 1:
clientDoc.open(rptName, OpenReportOptions._openAsReadOnly+OpenReportOptions._refreshRepositoryObjects);
This said it could not be implemented before loging in....and the documentation says this only work for the RAS.
Option 2:
     CrystalReportViewer reportViewer = null;
     try {
          HttpSession session = request.getSession();
          reportViewer = PrepareSignetManifestReport(aryCrates, dateFrom, dateTo, dateSent, session, serContext, false);
          //if (session.getAttribute("refreshed") == null) {
               reportViewer.refresh();
               //session.setAttribute("refreshed", "true");
          reportViewer.processHttpRequest(request,response,serContext,out);
     finally
          if (reportViewer != null) {
               reportViewer.dispose();
When I add the 'reportViewer.refresh()' i then get the following error:
"Some parameters are missing values "
Any pointer in the right direction would be gratefully received.
Thanks
Matt.

Answer 1

Hi,
On looking into this issue it is just the sub-report that does not refresh when loaded from the session. The main report is okay. We are using JDBC with Oracle 10g.
Even if I change the parameters the main report refreshes okay, but the subreport doesn't.
Is there a work-around for this problem?
My code is pretty much based on the standard code generated by the system in the CRJavaHelper class so I am confident that my code is okay.
I really appreciate some help here as I have a client not trusting their continuity because it doesn't display in the report and I don't want to have to close the report each time because of the performance. I have tried reseting the parameter fields
Thanks
Matt.