diff --git a/main/inc/lib/sessionmanager.lib.php b/main/inc/lib/sessionmanager.lib.php
index fa2f2ca83f..5ee5ce808d 100755
--- a/main/inc/lib/sessionmanager.lib.php
+++ b/main/inc/lib/sessionmanager.lib.php
@@ -5429,13 +5429,15 @@ class SessionManager
     }
 
     /**
-     * Returns the list of session (name, short description, start date, end date) from category.
-     * The short description is an extra field value
+     * Returns list of a few data from session (name, short description, start date, end date)
+     * And the next extra fields
+     * short_description, mode, duration, vacancies, brochure, target, schedule
+     * from Session category Id.
      * @param int $categoryId
      * @param string $target
      * @return mixed
      */
-    public static function getSessionBriefListByCategory($categoryId, $target) {
+    public static function getBriefSessionListAndExtraByCategory($categoryId, $target) {
         // Init variables
         $categoryId = (int) $categoryId;
         $sessionList = array();
@@ -5653,13 +5655,13 @@ class SessionManager
                 // Not found result, update error message
                 $errorResult['errorMessage'] = 'Not found any session for session category id ' . $sessionCategoryId;
             }
-
-            return $errorResult;
         }
+
+        return $errorResult;
     }
 
     /**
-     * Return session description from
+     * Return session description from session id
      * @param int $sessionId
      * @return string
      */
@@ -5669,7 +5671,7 @@ class SessionManager
         $sessionId = intval($sessionId);
         $description = '';
         // Check if session id is valid
-        if ($sessionId !== 0) {
+        if ($sessionId > 0) {
             // Select query from session id
             $rows = Database::select(
                 'description',
diff --git a/main/inc/lib/usermanager.lib.php b/main/inc/lib/usermanager.lib.php
index 1ece6eeb3a..314e553092 100755
--- a/main/inc/lib/usermanager.lib.php
+++ b/main/inc/lib/usermanager.lib.php
@@ -5116,7 +5116,7 @@ EOF;
     public static function getStudentBoss($userId)
     {
         $userId = intval($userId);
-        if ($userId !== 0) {
+        if ($userId > 0) {
             $userRelTable = Database::get_main_table(TABLE_MAIN_USER_REL_USER);
             $row = Database::select(
                 'DISTINCT friend_user_id AS boss_id',
diff --git a/main/webservices/registration.soap.php b/main/webservices/registration.soap.php
index 9fc2bad13d..c06d01b30c 100755
--- a/main/webservices/registration.soap.php
+++ b/main/webservices/registration.soap.php
@@ -22,13 +22,13 @@ function return_error($code) {
             $fault = new soap_fault('Server', '', 'Secret key is not correct or params are not correctly set');
             break;
         case WS_ERROR_NOT_FOUND_RESULT:
-            $fault = new soap_fault('Server', '', 'Not found any result from the query');
+            $fault = new soap_fault('Server', '', 'No result was found for this query');
             break;
         case WS_ERROR_INVALID_INPUT:
             $fault = new soap_fault('Server', '', 'The input variables are invalid o are not correctly set');
             break;
         case WS_ERROR_SETTING:
-            $fault = new soap_fault('Server', '', 'Please check the configuration and installation for this webservice');
+            $fault = new soap_fault('Server', '', 'Please check the configuration for this webservice');
             break;
     }
     return $fault;
diff --git a/plugin/advancedsubscription/src/HookAdvancedSubscription.php b/plugin/advancedsubscription/src/HookAdvancedSubscription.php
index 2a3c8f53c8..a8da5861a3 100644
--- a/plugin/advancedsubscription/src/HookAdvancedSubscription.php
+++ b/plugin/advancedsubscription/src/HookAdvancedSubscription.php
@@ -397,7 +397,7 @@ class HookAdvancedSubscription extends HookObserver implements
         }
 
         // Get the session brief List by category
-        $sessionList = SessionManager::getSessionBriefListByCategory($sessionCategoryId, $params['target']);
+        $sessionList = SessionManager::getBriefSessionListAndExtraByCategory($sessionCategoryId, $params['target']);
 
         return $sessionList;
     }