diff --git a/classes/BasicSpecialFunction.php b/classes/BasicSpecialFunction.php
index 93dde2673700ce127152eb91dfcce4f0f45328f9..28d3ac5a265d4843db3fcf3c0c8b014c034acd75 100644
--- a/classes/BasicSpecialFunction.php
+++ b/classes/BasicSpecialFunction.php
@@ -73,7 +73,8 @@ class SpecialFunction extends AbstractSpecialFunction{
  	  $base['this']['contentType'] = $acceptContentType;
  	  $base['model']['directory'] = $conf['model']['directory'];
  	  $base['view']['directory'] = $conf['view']['directory'];
- 	  $base['ns'] = $conf['ns'];  	  $base['ns'] = $conf['ns'];
+ 	  $base['ns'] = $conf['ns'];
+ 	  $base['sparqlendpoint'] = $conf['endpoint'];
   	  $base['type'] = $modelFile;
   	  $base['header'] = $prefixHeader;
   	  $base['args'] = $args;
@@ -83,7 +84,8 @@ class SpecialFunction extends AbstractSpecialFunction{
   	  $base['view']['directory'] = $conf['home'].$conf['view']['directory'];
   	  $base['model']['directory'] = $conf['home'].$conf['model']['directory'];
   	  chdir($conf['model']['directory']);
-  	  Utils::queryFile($modelFile, $endpoints['local'], $data);
+  	  $first = array();
+  	  Utils::queryFile($modelFile, $endpoints['local'], $data, $first);
   	  chdir($conf['home']);
   	  $data = Utils::internalize($data);
 
diff --git a/classes/MetaDb.php b/classes/MetaDb.php
index 6bed8c9096fdccb8c1a7496d379ebd4d5e230ae8..5cf0d89a8d04cc9a2cd58341c2edf11b09912946 100644
--- a/classes/MetaDb.php
+++ b/classes/MetaDb.php
@@ -30,13 +30,13 @@ class MetaDb{
         global $conf;
         try{
 	    	$db = new PDO('sqlite:'.$this->dbLocation);
-	    	$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
-
-	        $results = $db->exec($q);
+	    	$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+	    	$results = $db->exec($q);
 			$db = NULL;
-		}catch(PDOException $e){
-				print 'Exception exec: '.$e->getMessage()."\n\n";
-				exit(10);
+		}catch(Exception $e){
+				echo "Can't write in SQLite database. Please check you have granted write permissions to <tt>meta/</tt> and <tt>meta/db.sqlite</tt>.";
+		  		trigger_error('Exception exec: '.$e->getMessage(), E_USER_ERROR);
+				exit(1);
 		}
         return $results;
   }
diff --git a/classes/Utils.php b/classes/Utils.php
index 6002caa4a753b2d472e250bd8fa01a4068c14a15..2c7581fd54bca5b4accc910fee429ab5075d4802 100644
--- a/classes/Utils.php
+++ b/classes/Utils.php
@@ -22,9 +22,12 @@ class Utils{
   	exit(0);
   }
   
-  public static function send500($uri){
+  public static function send500($msg = null){
   	header("HTTP/1.0 500 Internal Server Error");
   	echo "An internal error ocurred. Please try later\n\n";
+  	if($msg != null){
+  	  echo $msg;
+  	}
   	exit(0);
   }
   
diff --git a/views/header.inc b/views/header.inc
index 2f26f6f401cc1fbda895c3e1e787bfe528d8e4c6..7aad9cf624b51f51958f89a9f147644f8df296c6 100644
--- a/views/header.inc
+++ b/views/header.inc
@@ -1,4 +1,5 @@
+<h4>Endpoint: {{base.sparqlendpoint.local}}</h4>
 <div style='float:center'>
-<a href='{{base.home}}'>Home</a> | <a href='{{base.home}}/special/classes'>Classes</a> | <a href='{{base.home}}/special/namedGraphs'>Named Graphs</a>
+<a href='{{base.home}}'>Home</a> | <a href='{{base.home}}special/classes'>Classes</a> | <a href='{{base.home}}special/namedGraphs'>Named Graphs</a>
 </div>
 
diff --git a/views/special.classes.view.html b/views/special.classes.view.html
index 0f25575e1de1fad85e6b7d893e5dd692541b4f01..8a7777fe863303235d9f846e0be11cfbb70b9f00 100644
--- a/views/special.classes.view.html
+++ b/views/special.classes.view.html
@@ -11,14 +11,8 @@
     <h1>Classes available</h1>
 {%include "header.inc"%}
 	<ul>
-	{% if r.resource.value != null %}
-	    <!-- Only one class available -->
-        <li><a href='{{base.baseUrl}}special/instances/{{ r.resource.curie }}'>{{r.resource.curie}}</a></li>
-    {% endif %}
     {% for row in r %}
-      {% if row.resource.value %}
         <li><a href='{{base.baseUrl}}special/instances/{{ row.resource.curie }}'>{{row.resource.curie}}</a></li>
-      {% endif %}
     {% endfor %}
     </ul>
   </body>
diff --git a/views/special.namedGraphs.view.html b/views/special.namedGraphs.view.html
index e7eca6c297aa76144fdbb0ffe674176f28cceca0..65ee0d422589ded5522de1f6a0330367f293fefc 100644
--- a/views/special.namedGraphs.view.html
+++ b/views/special.namedGraphs.view.html
@@ -8,7 +8,7 @@
     <link href="{{base.baseUrl}}/lodspeakr/css/basic.css" rel="stylesheet" type="text/css" media="screen" />
   </head>
   <body>
-    <h1>Graphs available in the triple store</h1>
+    <h1>Graphs available</h1>
 {%include "header.inc"%}
 	<ul>
     {% for row in r %}