CrystalReportViewer - Setting parameter throws ancestor error on page navigation

Question

We are having web application reports in the application using BO-XI SDK Viewer API. This API approach was working fine earlier. We upgrade our reporting component to SAP BO-4 (Crystal Server 2011) due to EOL of BOXI.
We have updated new API’s provided by SAP as per guide.
We updated web based Crystal Report Viewer (DHTML Viewer). The crystalreportviewer folder coming with SAP CS 2011.
We applied updated patch set upto last patch released CS2011 SP4 Patch4.
We still facing issue while viewing report in DHTML viewer provided by SAP. Please advice on below.
In our web application we do have updated folder for /crystalreportviewer.
We dynamically creating enterprise session object to get client document which explained as below –
IEnterpriseSession es = null;
try{
es = sm.logon(mUser, mPassword, mAPSName, mAuthType);
}catch(Exception e){
// request dispatched to error page
// Get the Report Application Factory service from Crystal Enterprise
IReportAppFactory rptAppFactory = (IReportAppFactory)es.getService("", "RASReportService");
// Get the InfoStore service from Crystal Enterprise
IInfoStore infoStore = (IInfoStore)es.getService("", "InfoStore");
IInfoObjects oInfoObjects = infoStore.query(“Select * From CI_INFOOBJECTS…for RPT File.”);
ReportClientDocument clientDoc = rptAppFactory.openDocument((IInfoObject)oInfoObjects.get(0), 0, objLocale);
Setting parameter
// Setting Parameter to clientDoc
Object[] parameters = { 
                                                parseDate(fromDate),
                                                parseDate(endDate),
                                                getLanguageID(request),
                                                reportName,
                                                getLanguageID(request)
Fields parameterFields = clientDoc.getDataDefController().getDataDefinition().getParameterFields();
for(int index=0; index < parameters.length; index++){
                ParameterField oldParameter = (ParameterField)parameterFields.getField(index);
                ParameterField newParameter = (ParameterField) oldParameter.clone(true);
                newParameter.getCurrentValues().removeAllElements();                                                   
                ParameterFieldDiscreteValue newDiscreteValueObj = new ParameterFieldDiscreteValue();
                newDiscreteValueObj.setValue(parameters[index]);
                newParameter.getCurrentValues().add(newDiscreteValueObj);
                ParameterFieldController paramController = clientDoc.getDataDefController().getParameterFieldController();
                paramController.modify(oldParameter, newParameter);
// Create an  Viewer
CrystalReportViewer viewer = new CrystalReportViewer();
//Set the name for the interactive viewer
viewer.setName("Crystal_Report_Viewer");
viewer.setDisplayPage(true);
//Set Navigation button false
viewer.setHasHistoryNavigationButtons(false);
//Set best fit to page true
viewer.setBestFitPage(true);
// Set reuse parameter on referesh
viewer.setReuseParameterValuesOnRefresh(true);
// Set Own Page true
viewer.setOwnPage(true);
// Enabled export and print button
viewer.setHasExportButton(true);
viewer.setHasPrintButton(true);
// Group Tree Removed
viewer.setDisplayGroupTree(false);
// Toggle group false
viewer.setHasToggleGroupTreeButton(false);
//viewer.refresh();
// Removed refersh button
viewer.setHasRefreshButton(false);
viewer.setPrintMode(CrPrintMode.ACTIVEX);
// Set the source for the interactive viewer to the client documents report source
viewer.setReportSource(clientDoc.getReportSource());
// Retain parameter and set again for pagination in viewer
setReportURL(viewer,request);
// Process the http request to view the report
viewer.processHttpRequest(request, response, getServletConfig().getServletContext(), out);
//response.flushBuffer();
// Close client document
clientDoc.close();
// Dispose of the viewer object
viewer.dispose();
es.logoff();
Issue we faced?
a) On Pagination thorws exception in webreportinglog as
[@APPNAME@] ERROR [[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'] WebReportLogger.error(62) | Unable to set the ancestors
com.businessobjects.report.web.json.JSONException: JSONObject["ancestors"] is not a JSONArray.
                at com.businessobjects.report.web.json.JSONObject.getJSONArray(JSONObject.java:456)
                at com.businessobjects.report.web.shared.JSONParameter.getDiscreteValueFromJSON(JSONParameter.java:670)
                at com.businessobjects.report.web.shared.JSONParameter.getValueFromJSON(JSONParameter.java:609)
                at com.businessobjects.report.web.shared.JSONParameter.jsonToDefaultFieldValues(JSONParameter.java:587)
                at com.businessobjects.report.web.shared.JSONParameter.getDefaultValues(JSONParameter.java:474)
                at com.businessobjects.report.web.shared.JSONParameter.toParameterField(JSONParameter.java:872)
                at com.businessobjects.report.web.shared.ParametersHelper.jsonToFields(ParametersHelper.java:309)
                at com.businessobjects.report.web.state.ViewerState.restoreCommonState(ViewerState.java:2838)
                at com.businessobjects.report.web.state.ViewerState.restore(ViewerState.java:2741)
                at com.businessobjects.report.web.component.ViewerContainer.restoreState(ViewerContainer.java:210)
                at com.businessobjects.report.web.WorkflowController.loadViewState(WorkflowController.java:418)
                at com.businessobjects.report.web.WorkflowController.init(WorkflowController.java:393)
b) On Export / print button nothing happened even request didn’t passed.
WEB-INF/web.xml entry as below.
<?xml version="1.0"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
                <context-param>
        <param-name>crystal_document_view</param-name>
                                <!-- weblayout : Fills the entire report view pane with the report. There is no grey background -->
        <param-value>weblayout</param-value>
                </context-param>
                <context-param>
                                <param-name>crystal_exception_log_file</param-name>
                                <param-value>webreportingexception.log</param-value>
                </context-param>
                <context-param>
        <param-name>crystal_exception_info</param-name>
                                <!-- long - Displays the exception information with the accompanying stack trace. -->
        <param-value>long</param-value>
                </context-param>
                <context-param>
                                <param-name>crystal_image_uri</param-name>
                                <param-value>/TangibleWebApp/crystalreportviewers</param-value>
                </context-param>
                <context-param>
        <param-name>crystal_image_use_relative</param-name>
        <param-value>webapp</param-value>
                </context-param>
                <context-param>
                                <param-name>crystal_processing_indicator_delay</param-name>
                                <param-value>100</param-value>
                </context-param>
                <context-param>
                                <param-name>crystal_use_asynchronous_requests</param-name>
                                <param-value>false</param-value>
                </context-param>
                <context-param>
                                <param-name>crystal_servlet_uri</param-name>
                                <param-value>/TangibleWebApp/CrystalReportViewerHandler</param-value>
                </context-param>
                <servlet>
        <servlet-name>CrystalReportViewerServlet</servlet-name>
        <servlet-class>com.crystaldecisions.report.web.viewer.CrystalReportViewerServlet</servlet-class>
                </servlet>
                <servlet-mapping>
                                <servlet-name>CrystalReportViewerServlet</servlet-name>
                                <url-pattern>/TangibleWebApp/CrystalReportViewerHandler</url-pattern>
                </servlet-mapping>
                <servlet>
                                <servlet-name>document</servlet-name>
                                <servlet-class>com.oreilly.servlet.OpenDoc</servlet-class>
                </servlet>
                <servlet>
                                <servlet-name>InitialServlet</servlet-name>
                                <servlet-class>com.servlet.InitialServlet</servlet-class>
                                <load-on-startup>1</load-on-startup>
                </servlet>
                <servlet>
                                <servlet-name>FactorsLogo</servlet-name>
                                <servlet-class>com.servlet.FactorsLogo</servlet-class>
                </servlet>
                <servlet-mapping>
                                <servlet-name>FactorsLogo</servlet-name>
                                <url-pattern>/servlet/FactorsLogo</url-pattern>
                </servlet-mapping>
                <servlet-mapping>
                                <servlet-name>document</servlet-name>
                                <url-pattern>/servlet/document</url-pattern>
                </servlet-mapping>
                <session-config>
                                <session-timeout>30</session-timeout>
                </session-config>
                <welcome-file-list>
                                <welcome-file>/tangible/index.jsp</welcome-file>
                </welcome-file-list>
                <listener>
                                <listener-class>com.common.util.applistener.AppListener</listener-class> 
                </listener>
</web-app>
Thanks in advance for your advice / suggestions.

Answer 1

Am I right in guessing that you were previously using the ActiveX viewer?
Currently your code is closing the document and logging off Enterprise.  Pretty much any action that is done in the DHTML viewer will cause a postback to the server which will no longer have the document or session available with your current code which will cause all sorts of problems.  You need to persist these objects, and only clean them up once you are completely finished with them.