Crystal Report throws NULL Pointer Exception from Java

Hi,

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We are using crystal report in our application and we are changing the report datasource with the application datasource through our code. We are using CR4E 2008 to achieve this solution. We are getting a NULLPointerException, when we run the report in Oc4J(Oracle Apps Server) with JDK1.6. Could you please help us in achieving the solution

Exception:

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Connection logon:Database DLL=s(crdb_jdbc.dll);Trusted_Connection=s(true);PreQEServerType=s(JDBC (JNDI));Server

Type=s(JDBC (JNDI));Use JDBC=s(true);Database Class Name=s();JNDI Datasource Name=s(jdbc/1495);Connection URL=s();User ID=s(myapp);Password=

detected an exception: java.lang.NullPointerException

at com.crystaldecisions.reports.queryengine.driverImpl.jdbc.JDBCConnection.Open(Unknown Source)

at com.crystaldecisions.reports.queryengine.JDBConnectionWrapper.Open(SourceFile:123)

at com.crystaldecisions.reports.queryengine.Connection.br(SourceFile:1771)

at com.crystaldecisions.reports.queryengine.Connection.bs(SourceFile:491)

at com.crystaldecisions.reports.queryengine.Connection.t1(SourceFile:2978)

at com.crystaldecisions.reports.dataengine.dfadapter.DFAdapter.a(SourceFile:696)

at com.crystaldecisions.reports.dataengine.dfadapter.DFAdapter.for(SourceFile:706)

at com.crystaldecisions.reports.reportdefinition.ReportHelper.a(SourceFile:198)

at com.businessobjects.reports.sdk.requesthandler.ReportViewingRequestHandler.long(SourceFile:957)

at com.businessobjects.reports.sdk.requesthandler.ReportViewingRequestHandler.a(SourceFile:635)

at com.businessobjects.reports.sdk.requesthandler.ReportViewingRequestHandler.int(SourceFile:672)

at com.businessobjects.reports.sdk.JRCCommunicationAdapter.do(SourceFile:1944)

at com.businessobjects.reports.sdk.JRCCommunicationAdapter.if(SourceFile:661)

at com.businessobjects.reports.sdk.JRCCommunicationAdapter.a(SourceFile:167)

at com.businessobjects.reports.sdk.JRCCommunicationAdapter$2.a(SourceFile:529)

at com.businessobjects.reports.sdk.JRCCommunicationAdapter$2.call(SourceFile:527)

at com.crystaldecisions.reports.common.ThreadGuard.syncExecute(SourceFile:102)

at com.businessobjects.reports.sdk.JRCCommunicationAdapter.for(SourceFile:525)

at com.businessobjects.reports.sdk.JRCCommunicationAdapter.int(SourceFile:424)

at com.businessobjects.reports.sdk.JRCCommunicationAdapter.request(SourceFile:352)

at com.businessobjects.sdk.erom.jrc.a.a(SourceFile:54)

at com.businessobjects.sdk.erom.jrc.a.execute(SourceFile:67)

at com.crystaldecisions.proxy.remoteagent.RemoteAgent$a.execute(SourceFile:716)

at com.crystaldecisions.proxy.remoteagent.CommunicationChannel.a(SourceFile:125)

at com.crystaldecisions.proxy.remoteagent.RemoteAgent.a(SourceFile:537)

at com.crystaldecisions.sdk.occa.report.application.ds.a(SourceFile:186)

at com.crystaldecisions.sdk.occa.report.application.ReportSource.a(SourceFile:1558)

at com.crystaldecisions.sdk.occa.report.application.ReportSource.a(SourceFile:337)

at com.crystaldecisions.sdk.occa.report.application.ReportSource.export(SourceFile:286)

at com.crystaldecisions.sdk.occa.report.application.AdvancedReportSource.export(SourceFile:209)

at com.mysystems.myapp.common.CrystalRpt.print(CrystalRpt.java:387)

at regular.ShowReport._jspService(_ShowReport.java:277)

at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)

at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:350)

at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509)

at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)

at com.mysystems.myapp.common.ServletFilter.doFilter(ServletFilter.java:107)

at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:663)

at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330)

at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830)

at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:224)

at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:133)

at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)

at java.lang.Thread.run(Thread.java:662)

2011-06-27 10:42:03.598 09041510myappt myapp ShowReport.jspService(277) Error while generating crystal report com.crystaldecisions.sdk.occa.report.lib.ReportSDKException: java.lang.NullPointerException---- Error code:-2147467259 Error code name:failed

at com.businessobjects.reports.sdk.JRCCommunicationAdapter.if(SourceFile:741)