diff --git a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/admin/models/DescribrModel.php b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/admin/models/DescribrModel.php
index 175fd712..2b0a1c8b 100755
--- a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/admin/models/DescribrModel.php
+++ b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/admin/models/DescribrModel.php
@@ -15,8 +15,7 @@
 require_once('./Services/Database/classes/class.ilAuthContainerMDB2.php');
 
 
-class DescribrModel
-{
+class DescribrModel extends Libs\RESTModel {
 
     /**
      * Returns a description of an ILIAS object consisting of
@@ -29,9 +28,12 @@ class DescribrModel
      */
     public function describeIliasObject($obj_id)
     {
+        self::$app->log->debug('describe '.$obj_id);
+
         $a_objdata = $this->getObjectData($obj_id);
         $owner_id = $a_objdata['owner'];
 
+
         $a_usrdata = $this->getUserData($owner_id);
         foreach ($a_usrdata as $key => $value)
         {
diff --git a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/admin/routes/DescribrRoutes.php b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/admin/routes/DescribrRoutes.php
index 08854883..dae9c7d6 100755
--- a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/admin/routes/DescribrRoutes.php
+++ b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/admin/routes/DescribrRoutes.php
@@ -23,11 +23,16 @@
         $request = $app->request();
         $id_type = $request->params('id_type', 'ref_id');
 
+        $app->log->debug('in route '.$id_type);
+
+
         $result = array('msg' => array());
         $model = new DescribrModel();
         if ($id_type == 'ref_id' || $id_type == 'obj_id') {
             if ($id_type == 'ref_id') {
+                $app->log->debug('in route id: '.$id);
                 $obj_id = Libs\RESTLib::getObjIdFromRef($id);
+                $app->log->debug('in route id: '.$obj_id);
                 $id_type = 'obj_id';
             }
 
diff --git a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/mobile_v1/routes/MobileFileSpaceRoutes.php b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/mobile_v1/routes/MobileFileSpaceRoutes.php
index d4e7485b..0c9cd21c 100644
--- a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/mobile_v1/routes/MobileFileSpaceRoutes.php
+++ b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/mobile_v1/routes/MobileFileSpaceRoutes.php
@@ -73,7 +73,7 @@
                     'execution_time' => $t_end - $t_start
                 ));
 
-        } catch(LibExceptions\MissingParameter $e) {
+        } catch(Exceptions\MissingParameter $e) {
             $app->halt(422, $e->getFormatedMessage(), $e::ID);
         }
     });
@@ -107,7 +107,7 @@
                 $app->success(array(
                     'execution_time' => $t_end - $t_start
                 ));
-        } catch(LibExceptions\MissingParameter $e) {
+        } catch(Exceptions\MissingParameter $e) {
             $app->halt(422, $e->getFormatedMessage(), $e::ID);
         }
         $response->send();
@@ -178,7 +178,7 @@
             Libs\RESTLib::initAccessHandling();
             $model = new Files\PersonalFileSpaceModel();
             $model->deleteFromMyFileSpace($file_id, $user_id);
-        } catch(LibExceptions\MissingParameter $e) {
+        } catch(Exceptions\MissingParameter $e) {
             $app->halt(422, $e->getFormatedMessage(), $e::ID);
         }
         $t_end = microtime();
diff --git a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/users_v1/routes/UsersRoutes.php b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/users_v1/routes/UsersRoutes.php
index 4502c24c..cdf8204e 100755
--- a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/users_v1/routes/UsersRoutes.php
+++ b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/extensions/users_v1/routes/UsersRoutes.php
@@ -12,8 +12,6 @@
 
 
 $app->get('/v1/users', '\RESTController\libs\OAuth2Middleware::TokenAdminAuth', function () use ($app) {
-    try {
-
         $limit = 10;
         $offset = 0;
 
@@ -47,14 +45,10 @@
 
         $app->success($result);
 
-    } catch (\Exception $e) {
-        $app->halt(400, $e->getMessage());
-    }
 });
 
 
 $app->get('/v1/users/:user_id', '\RESTController\libs\OAuth2Middleware::TokenAuth', function ($user_id) use ($app) {
-    try {
         $id = $user_id;
         if ($user_id == "mine") {
             $auth = new Auth\Util();
@@ -68,14 +62,10 @@
 
         $app->success($usr_basic_info);
 
-    } catch (\Exception $e) {
-        $app->halt(400, $e->getMessage());
-    }
 });
 
 
 $app->post('/v1/users', '\RESTController\libs\OAuth2Middleware::TokenRouteAuth', function () use ($app) { // create
-    try { // root only
 
         $request = $app->request();
         $attribs = array("login", "passwd", "firstname", "lastname", "email", "gender", "auth_mode");
@@ -94,9 +84,7 @@
         $user_id = $usr_model->addUser($user_data);
 
         $app->success($user_id);
-    } catch (\Exception $e) {
-        $app->halt(400, $e->getMessage());
-    }
+
 });
 
 
diff --git a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/libs/RESTLib.php b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/libs/RESTLib.php
index 3efe567a..319ca747 100755
--- a/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/libs/RESTLib.php
+++ b/Customizing/global/plugins/Services/UIComponent/UserInterfaceHook/REST/RESTController/libs/RESTLib.php
@@ -86,8 +86,6 @@ protected static function quoteParams($params) {
                 $value = sprintf('(%s)', implode(', ', $value));
                 $result[] = $value;
             }
-            elseif (is_string($value))
-                $result[] = $ilDB->quote($value, 'text');
             elseif (is_int($value))
                 $result[] = $ilDB->quote($value, 'integer');
             elseif (is_integer($value))
@@ -96,8 +94,10 @@ protected static function quoteParams($params) {
                 $result[] = $ilDB->quote($value, 'float');
             elseif (is_double($value))
                 $result[] = $ilDB->quote($value, 'float');
-            elseif (is_numeric($value))
+            elseif (is_numeric($value)) // TODO: could be improved
                 $result[] = $ilDB->quote($value, 'float');
+            elseif (is_string($value))
+                $result[] = $ilDB->quote($value, 'text');
             // Fallback solution
             else
                 $result[] = $value;
@@ -215,7 +215,7 @@ static public function authenticateViaIlias($username, $password) {
     static public function getObjIdFromRef($ref_id) {
         global $ilDB;
 
-        $sql = self::safeSQL('SELECT obj_id FROM object_reference WHERE object_reference.ref_id = %d', $ref_id);
+        $sql = self::safeSQL('SELECT obj_id FROM object_reference WHERE object_reference.ref_id = %d', intval($ref_id));
         $query = $ilDB->query($sql);
         $row = $ilDB->fetchAssoc($query);
 
@@ -233,7 +233,7 @@ static public function getObjIdFromRef($ref_id) {
     static public function getRefIdFromObj($obj_id) {
         global $ilDB;
 
-        $sql = self::safeSQL('SELECT ref_id FROM object_reference WHERE object_reference.obj_id = %d', $obj_id);
+        $sql = self::safeSQL('SELECT ref_id FROM object_reference WHERE object_reference.obj_id = %d', intval($obj_id));
         $query = $ilDB->query($sql);
         $row = $ilDB->fetchAssoc($query);