Bug 173389 Exception is thrown when edit the cascading parameter group[0002]
Exception is thrown when edit the cascading parameter group[0002] Build number: 2.2.0.v20070208-1000 Steps to reproduce: 1.new a sample data source and select CUSTOMERS table as data set 2.new a cascading parameter group and use the data set,select the CUSTOMERNAME ,drag the parameter to layout then preview 3.switch to data explorer ,click the parameter ,change the CUSTOMERNAME to CUSTOMERNUMBER 4.preview in layout Expected result: No exception thrown Actual result: Exception thrown Error log: see attached image
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/BirtViewerReportService.java
ServletContext servletContext = (ServletContext) context;
		ReportEngineService.getInstance( ).setEngineContext( servletContext,
				request );
	}
	/**
	 * Returns report runnable object
	 * 
	 * @param design
	 * @param moduleOptions
	 * @return
	 * @throws ReportServiceException
	 */
	public IReportRunnable getReportRunnable( IViewerReportDesignHandle design,
			Map moduleOptions ) throws ReportServiceException
	{
		IReportRunnable runnable;
		if ( design.getContentType( ) == IViewerReportDesignHandle.RPT_RUNNABLE_OBJECT )
		{
			
			runnable = (IReportRunnable) design.getDesignObject( );
		}
		else
		{
			
			try
			{
				runnable = ReportEngineService.getInstance( ).openReportDesign(
						design.getFileName( ), moduleOptions );
			}
			catch ( EngineException e )