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
context, op, upResponse );
			runReport.execute( );
		}
		try
		{
			BirtRenderReportActionHandler renderReport = new BirtRenderReportActionHandler(
					context, op, upResponse, out );
			renderReport.execute( );
		}
		catch ( RemoteException e )
		{
			AxisFault fault = (AxisFault) e;
			String message = "<html><body><font color=\"red\">"  
					+ ParameterAccessor.htmlEncode( fault.getFaultString( ) )
					+ "</font></body></html>"; 
			out.write( message.getBytes( ) );
		}
	}
	/**
	 * Override implementation of doPostService.
	 */
	protected String doPostService( HttpServletRequest request,
			HttpServletResponse response ) throws ServletException, IOException
	{
		assert ParameterAccessor.PARAM_FORMAT_PDF
				.equalsIgnoreCase( ParameterAccessor.getFormat( request ) );
		return null;
	}
}