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/service/ReportEngineService.java
else if ( "INFO".equalsIgnoreCase( logLevel ) ) 
		{
			level = Level.INFO;
		}
		else if ( "CONFIG".equalsIgnoreCase( logLevel ) ) 
		{
			level = Level.CONFIG;
		}
		else if ( "FINE".equalsIgnoreCase( logLevel ) ) 
		{
			level = Level.FINE;
		}
		else if ( "FINER".equalsIgnoreCase( logLevel ) ) 
		{
			level = Level.FINER;
		}
		else if ( "FINEST".equalsIgnoreCase( logLevel ) ) 
		{
			level = Level.FINEST;
		}
		else if ( "OFF".equalsIgnoreCase( logLevel ) ) 
		{
			level = Level.OFF;
		}
		config.setLogConfig( logDirectory, level );
		
		String scriptLibDir = servletConfig.getServletContext( )
				.getInitParameter( ParameterAccessor.INIT_PARAM_SCRIPTLIB_DIR );
		if ( scriptLibDir == null || scriptLibDir.trim( ).length( ) <= 0
				|| ParameterAccessor.isRelativePath( scriptLibDir ) )