java.lang.NullPointerException
               at org.eclipse.birt.report.utility.BirtUtility.validateParameters(BirtUtility.java:382)
               at org.eclipse.birt.report.context.ViewerAttributeBean.__initParameters(ViewerAttributeBean.java:269)
               at org.eclipse.birt.report.context.ViewerAttributeBean.__init(ViewerAttributeBean.java:231)
               at org.eclipse.birt.report.context.BaseAttributeBean.init(BaseAttributeBean.java:230)
               at org.eclipse.birt.report.context.ViewerAttributeBean.<init>(ViewerAttributeBean.java:118)
               at org.eclipse.birt.report.context.BirtContext.__init(BirtContext.java:44)
               at org.eclipse.birt.report.context.BaseContext.<init>(BaseContext.java:69)
               at org.eclipse.birt.report.context.BirtContext.<init>(BirtContext.java:30)
               at org.eclipse.birt.report.servlet.ViewerServlet.__getContext(ViewerServlet.java:150)
               at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.doGet(BirtSoapMessageDispatcherServlet.java:151)
               at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
               at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
               at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
               at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.service(BirtSoapMessageDispatcherServlet.java:122)
               at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
               at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
               at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
               at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
               at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
               at org.eclipse.birt.report.filter.ViewerFilter.doFilter(ViewerFilter.java:68)
               at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:60)
               at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3739)
               at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3705)
               at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
               at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
               at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2282)
               at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2181)
               at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1491)
               at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
               at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)