Bug 313882 [Regression]pageoverflow plus pagebreakinternal shows different pdf pages in web viewer and preview
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/RunAndRenderTask.java
TASK_RUNANDRENDER );
		}
		try
		{
			switchToOsgiClassLoader( );
			changeStatusToRunning( );
			doRun( );
		}
		finally
		{
			changeStatusToStopped( );
			switchClassLoaderBack( );
			if ( progressMonitor != null )
			{
				progressMonitor.onProgress( IProgressMonitor.END_TASK,
						TASK_RUNANDRENDER );
			}
		}
	}
	void doRun( ) throws EngineException
	{
		
		doValidateParameters( );
		setupRenderOption( );
		loadDesign( );
		prepareDesign( );
		startFactory( );
		updateRtLFlag( );
		startRender( );
		try