public void set_order_to_idx( String idxFileName )
	{
		if(canIfNoCdx())
		{
		order = "[idx]";
		Idx = new idx();
		try { Idx.fidx =  new RandomAccessFile( new File( g_idxname(idxFileName) ), fmode()); }
		catch (FileNotFoundException e1) { e1.printStackTrace(); }
		Idx.read_header();
		Idx.recno = recno;
		updateseek();
		}
	}