--- cacti/lib/functions.php~	2008-10-05 06:16:11.000000000 +0300
+++ cacti/lib/functions.php	2008-10-05 06:16:13.069722888 +0300
@@ -690,6 +690,9 @@ function tail_file($file_name, $number_o
 	$filter = strtolower($filter);
 
 	$fp = fopen($file_name, 'r');
+	if (!$fp) {
+		return array();
+	}
 
 	/* Count all lines in the logfile */
 	$total_rows = 0;