diff --git a/main/webservices/courses_list.rest.php b/main/webservices/courses_list.rest.php
index 36ab5c5e18..bbf05ddf9a 100755
--- a/main/webservices/courses_list.rest.php
+++ b/main/webservices/courses_list.rest.php
@@ -29,9 +29,6 @@ function courses_list($security_key, $visibilities = 'public') {
    		return array('error_msg' => 'Security check failed');
    	}
 
-   	// Libraries
-	require_once api_get_path(LIBRARY_PATH).'course.lib.php';
-
 	$vis = array('public' => '3', 'public-registered' => '2', 'private' => '1', 'closed' => '0');
 
 	$courses_list = array();
diff --git a/main/webservices/courses_list.soap.php b/main/webservices/courses_list.soap.php
index 325bd708d1..b28ed8c274 100755
--- a/main/webservices/courses_list.soap.php
+++ b/main/webservices/courses_list.soap.php
@@ -76,8 +76,6 @@ $server->register('WSCourseList',         // method name
 function WSCourseList($username, $signature, $visibilities = 'public') {
     if (empty($username) or empty($signature)) { return -1; }
 
-    require_once api_get_path(LIBRARY_PATH).'course.lib.php';
-    require_once api_get_path(LIBRARY_PATH).'usermanager.lib.php';
     global $_configuration;
 
     $info = api_get_user_info_from_username($username);
@@ -96,9 +94,6 @@ function WSCourseList($username, $signature, $visibilities = 'public') {
         return -1; // The secret key is incorrect.
     }
 
-   	// Libraries
-	require_once (api_get_path(LIBRARY_PATH).'course.lib.php');
-
 	$vis = array('public' => '3', 'public-registered' => '2', 'private' => '1', 'closed' => '0');
 
 	$courses_list = array();
diff --git a/main/webservices/registration.soap.php b/main/webservices/registration.soap.php
index 942c48c9ac..b7ffcb9ee1 100755
--- a/main/webservices/registration.soap.php
+++ b/main/webservices/registration.soap.php
@@ -7,12 +7,9 @@ require '../inc/global.inc.php';
 $libpath = api_get_path(LIBRARY_PATH);
 require_once $libpath.'nusoap/nusoap.php';
 require_once $libpath.'fileManage.lib.php';
-require_once $libpath.'usermanager.lib.php';
 require_once $libpath.'fileUpload.lib.php';
 require_once api_get_path(INCLUDE_PATH).'lib/mail.lib.inc.php';
 require_once $libpath.'add_course.lib.inc.php';
-require_once $libpath.'course.lib.php';
-require_once $libpath.'sessionmanager.lib.php';
 
 $debug = false;
 
@@ -4788,7 +4785,7 @@ function WSListCourses($params) {
         }
 
         // Determining number of students registered in course
-        $course_tmp['number_students'] = CourseManager::get_users_count_in_course($course['code']);
+        $course_tmp['number_students'] = CourseManager::get_users_count_in_course($course['code']);      
         
         // Determining external course id
         $course_tmp['external_course_id'] = CourseManager::get_course_extra_field_value($course_field_name, $course['code']);
diff --git a/main/webservices/user_info.soap.php b/main/webservices/user_info.soap.php
index c53f413b36..d03c138597 100755
--- a/main/webservices/user_info.soap.php
+++ b/main/webservices/user_info.soap.php
@@ -71,9 +71,6 @@ $server->register('DokeosWSCourseListOfUser',   // method name
  */
 function DokeosWSCourseListOfUser($username, $signature) {
     if (empty($username) or empty($signature)) { return -1; }
-
-    require_once api_get_path(LIBRARY_PATH).'course.lib.php';
-    require_once api_get_path(LIBRARY_PATH).'usermanager.lib.php';
     global $_configuration;
 
     $info = api_get_user_info_from_username($username);
@@ -90,9 +87,6 @@ function DokeosWSCourseListOfUser($username, $signature) {
         return -1; // The secret key is incorrect.
     }
 
-    // libraries
-    require_once api_get_path(LIBRARY_PATH).'course.lib.php';
-
     $courses_list = array();
     $courses_list_tmp = CourseManager::get_courses_list_by_user_id($user_id);
     foreach ($courses_list_tmp as $index => $course) {
@@ -159,9 +153,6 @@ $server->register('DokeosWSEventsList',       // method name
 function DokeosWSEventsList($username, $signature, $datestart = 0, $dateend = 0) {
 
     if (empty($username) or empty($signature)) { return -1; }
-
-    require_once api_get_path(LIBRARY_PATH).'course.lib.php';
-    require_once api_get_path(LIBRARY_PATH).'usermanager.lib.php';
     global $_configuration;
 
     $info = api_get_user_info_from_username($username);
@@ -177,10 +168,6 @@ function DokeosWSEventsList($username, $signature, $datestart = 0, $dateend = 0)
     if (!api_is_valid_secret_key($signature, $local_key)) {
         return -1; // The secret key is incorrect.
     }
-
-    // Libraries
-    require_once api_get_path(LIBRARY_PATH).'usermanager.lib.php';
-
     $events_list = array();
 
     $user_id = UserManager::get_user_id_from_username($username);
diff --git a/main/webservices/webservice.php b/main/webservices/webservice.php
index ebb3e2744b..60cb2300de 100755
--- a/main/webservices/webservice.php
+++ b/main/webservices/webservice.php
@@ -4,9 +4,6 @@
  * @package chamilo.webservices
  */
 require_once(dirname(__FILE__).'/../inc/global.inc.php');
-$libpath = api_get_path(LIBRARY_PATH);
-require_once $libpath.'usermanager.lib.php';
-require_once $libpath.'course.lib.php';
 
 /**
  * Error returned by one of the methods of the web service. Contains an error code and an error message
diff --git a/main/webservices/webservice_report.php b/main/webservices/webservice_report.php
index cb4a45b407..6feaa8d4f6 100755
--- a/main/webservices/webservice_report.php
+++ b/main/webservices/webservice_report.php
@@ -4,11 +4,6 @@
  * @package chamilo.webservices
  */
 require_once(dirname(__FILE__).'/../inc/global.inc.php');
-$libpath = api_get_path(LIBRARY_PATH);
-require_once($libpath.'sessionmanager.lib.php');
-require_once $libpath.'usermanager.lib.php';
-require_once $libpath.'tracking.lib.php';
-require_once $libpath.'course.lib.php';
 require_once(dirname(__FILE__).'/webservice.php');
 
 /**
diff --git a/main/webservices/webservice_user.php b/main/webservices/webservice_user.php
index bb3502e3c8..6fc97b925e 100644
--- a/main/webservices/webservice_user.php
+++ b/main/webservices/webservice_user.php
@@ -4,8 +4,6 @@
  * @package chamilo.webservices
  */
 require_once(dirname(__FILE__).'/../inc/global.inc.php');
-$libpath = api_get_path(LIBRARY_PATH);
-require_once $libpath.'usermanager.lib.php';
 require_once(dirname(__FILE__).'/webservice.php');
 
 /**