Crystal Report: ERROR - Some parameters are missing values

Question

          mine report it possesses a single parameter ....
          this is the example of like tries of to change the value set up in the report...
          ERROR: Some parameters are missing values
          thanks help...
          EXAMPLE:
          <%@ page import="com.crystaldecisions.report.web.viewer.*"%>
          <%@ page import="com.crystaldecisions.report.htmlrender.*"%>
          <%@ page import="com.crystaldecisions.reports.reportengineinterface.*"%>
          <%@ page import="com.crystaldecisions.sdk.occa.report.reportsource.*"%>
          <%@ page import="com.crystaldecisions.sdk.occa.report.data.*"%>
          <%@ page import="com.crystaldecisions.common.keycode.*"%>
          <%@ page import="java.util.*"%>
          <%
          try {
          IReportSourceFactory2 rptSrcFactory = new JPEReportSourceFactory();
          String report = "report/ReportParametro1.rpt";
          IReportSource reportSource = (IReportSource) rptSrcFactory.createReportSource(report,
          request.getLocale());
          Fields fields = new Fields();
          ParameterField pfield1 = new ParameterField();
          Values vals1 = new Values();
          ParameterFieldDiscreteValue pfieldDV1 = new ParameterFieldDiscreteValue();
          pfield1.setName("CICCIA");
          pfieldDV1.setValue("SELECT descrizione, validoDa, validoA FROM tariffari");
          pfieldDV1.setDescription("Query Dinamica....");
          vals1.add(pfieldDV1);
          pfield1.setCurrentValues(vals1);
          fields.add(pfield1);
          CrystalReportViewer viewer = new CrystalReportViewer();
          viewer.setReportSource(reportSource);
          // layout
          viewer.setOwnPage(true);
          viewer.setBestFitPage(true);
          viewer.setHasLogo(false);
          viewer.setHasRefreshButton(true);
          // group navigation
          viewer.setHasToggleGroupTreeButton(false);
          viewer.setDisplayGroupTree(false);
          // page navigation:
          viewer.setHasGotoPageButton(false);
          // print/export
          viewer.setHasExportButton(true);
          //viewer.setPrintMode(CrPrintMode.PDF);
          viewer.setPrintMode(CrPrintMode.ACTIVEX);
          viewer.setIgnoreViewStateOnLoad(true);
          viewer.setParameterFields(fields);
          viewer.setEnableParameterPrompt(false);
          viewer.refresh();
          viewer.processHttpRequest(request, response, getServletConfig().getServletContext(),
          out);
          viewer.dispose();
          }catch(Exception e){
          out.println("Errore " + e.getMessage());
          %>
          

Answer 1

I am facing the same problem. After selecting an export option (PDF/RTF), the same error message is coming up.
          Also, what needs to be done for displaying export option of EXCEL?
          Thanks,
          Farzal