Bug 132914 "Invalid page number" error message is hard coded.
"Invalid page number" error message is hard coded in DocumentProcessor.java. This must be externalized into *.properties file. If there are other hard coded error messages, please also externalize.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/presentation/aggregation/layout/FramesetFragment.java
.equalsIgnoreCase( ParameterAccessor.getFormat( request ) );
		response.setContentType( "application/pdf" ); 
	}
	/**
	 * Render the report in html/pdf format by calling frameset service.
	 * 
	 * @param request
	 *            incoming http request
	 * @param response
	 *            http response
	 * @exception ServletException
	 * @exception IOException
	 */
	protected void doService( HttpServletRequest request,
			HttpServletResponse response ) throws ServletException,
			IOException, BirtException
	{
		assert ParameterAccessor.PARAM_FORMAT_PDF
				.equalsIgnoreCase( ParameterAccessor.getFormat( request ) );
		BaseAttributeBean attrBean = (BaseAttributeBean) request
				.getAttribute( "attributeBean" ); 
		assert attrBean != null;
		ServletOutputStream out = response.getOutputStream( );
		IContext context = new BirtContext( request, response );
		GetUpdatedObjectsResponse upResponse = new GetUpdatedObjectsResponse( );
		Operation op = null;
		File file = new File( attrBean.getReportDocumentName( ) );
		if ( !file.exists( ) )
		{
			BirtRunReportActionHandler runReport = new BirtRunReportActionHandler(