Bug 121111 Bad event handler class name does not cause an error
Open a report design, open any Data Set's Property editor. Type in an invalid Java class name for the "Event Handler Class" property, say "aaa". Preview a report that uses that Data Set. The report executes normally. No error is shown. Event handlers are an integral part of a report design, and if a script handler class is not found, or if the handler throws a runtime exception, Report Engine should either stop the report execution, or show the error message in the generated report. (Tested with the 2005-12-15 nightly build)
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/RenderTask.java
emitter.initialize( services );
		return emitter;
	}
	/**
	 * @param pageNumber
	 *            the page to be rendered
	 * @throws EngineException
	 *             throws exception if there is a rendering error
	 */
	protected void doRender( long pageNumber ) throws EngineException
	{
		try
		{
			
			ReportContentLoader loader = new ReportContentLoader(
					executionContext );
			ReportExecutor executor = new ReportExecutor( executionContext );
			executionContext.setExecutor( executor );
			IContentEmitter emitter = createContentEmitter( executor );
			startRender( );
			loader.loadPage( pageNumber, emitter );
			closeRender( );
		}
		catch ( Exception ex )
		{
			log.log( Level.SEVERE,
					"An error happened while running the report. Cause:", ex ); 
		}
		catch ( OutOfMemoryError err )
		{