+ The report file : .rptdesign does not exist or contains errors.

org.eclipse.birt.report.exception.ViewerException: The report file : .rptdesign does not exist or contains errors.
	at org.eclipse.birt.report.context.ViewerAttributeBean.getDesignHandle(ViewerAttributeBean.java:650)
	at org.eclipse.birt.report.context.ViewerAttributeBean.__init(ViewerAttributeBean.java:224)
	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.BirtEngineServlet.__getContext(BirtEngineServlet.java:72)
	at org.eclipse.birt.report.servlet.BaseReportEngineServlet.doGet(BaseReportEngineServlet.java:163)
	at org.eclipse.birt.report.servlet.BaseReportEngineServlet.doPost(BaseReportEngineServlet.java:224)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
	at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
	at org.eclipse.birt.report.servlet.BaseReportEngineServlet.service(BaseReportEngineServlet.java:116)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
	at org.eclipse.birt.report.filter.ViewerFilter.doFilter(ViewerFilter.java:68)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:139)
	at org.jboss.as.web.NamingValve.invoke(NamingValve.java:57)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:154)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:567)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:667)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:952)
	at java.lang.Thread.run(Thread.java:722)