diff --git a/main/session/add_courses_to_session.php b/main/session/add_courses_to_session.php
index e03a1a0a28..615d53d7fe 100644
--- a/main/session/add_courses_to_session.php
+++ b/main/session/add_courses_to_session.php
@@ -76,7 +76,6 @@ function remove_item(origin)
 }
 </script>';
 
-$errorMsg = '';
 $CourseList = $SessionList = array();
 $courses = $sessions = array();
 
@@ -209,12 +208,6 @@ unset($Courses);
 <form name="formulaire" method="post" action="<?php echo api_get_self(); ?>?page=<?php echo $page; ?>&id_session=<?php echo $sessionId; ?><?php if (!empty($_GET['add'])) echo '&add=true'; ?>" style="margin:0px;" <?php if ($ajax_search) {echo ' onsubmit="valide();"'; }?>>
     <legend><?php echo $tool_name.' ('.$session_info['name'].')'; ?></legend>
     <input type="hidden" name="formSent" value="1" />
-
-    <?php
-    if (!empty($errorMsg)) {
-        echo Display::return_message($errorMsg); //main API
-    }
-    ?>
     <div id="multiple-add-session" class="row">
         <div class="col-md-4">
             <label><?php echo get_lang('CourseListInPlatform') ?> :</label>
diff --git a/main/session/session_add.php b/main/session/session_add.php
index 0e95ea45d2..0bb9745a15 100644
--- a/main/session/session_add.php
+++ b/main/session/session_add.php
@@ -2,8 +2,8 @@
 /* For licensing terms, see /license.txt */
 
 /**
-*	@package chamilo.admin
-*/
+ * @package chamilo.admin
+ */
 
 $cidReset = true;
 
@@ -34,27 +34,27 @@ $interbreadcrumb[] = array(
 function search_coachs($needle)
 {
     $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
-	$xajax_response = new xajaxResponse();
-	$return = '';
-
-	if (!empty($needle)) {
-		$order_clause = api_sort_by_first_name() ? ' ORDER BY firstname, lastname, username' : ' ORDER BY lastname, firstname, username';
-
-		// search users where username or firstname or lastname begins likes $needle
-		$sql = 'SELECT username, lastname, firstname
-		        FROM '.$tbl_user.' user
-				WHERE (username LIKE "'.$needle.'%"
-				OR firstname LIKE "'.$needle.'%"
-				OR lastname LIKE "'.$needle.'%")
-				AND status=1'.
-				$order_clause.
-				' LIMIT 10';
-
-		if (api_is_multiple_url_enabled()) {
-			$tbl_user_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
-			$access_url_id = api_get_current_access_url_id();
-			if ($access_url_id != -1) {
-				$sql = 'SELECT username, lastname, firstname
+    $xajax_response = new xajaxResponse();
+    $return = '';
+
+    if (!empty($needle)) {
+        $order_clause = api_sort_by_first_name() ? ' ORDER BY firstname, lastname, username' : ' ORDER BY lastname, firstname, username';
+
+        // search users where username or firstname or lastname begins likes $needle
+        $sql = 'SELECT username, lastname, firstname
+                FROM '.$tbl_user.' user
+                WHERE (username LIKE "'.$needle.'%"
+                OR firstname LIKE "'.$needle.'%"
+                OR lastname LIKE "'.$needle.'%")
+                AND status=1'.
+                $order_clause.
+                ' LIMIT 10';
+
+        if (api_is_multiple_url_enabled()) {
+            $tbl_user_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+            $access_url_id = api_get_current_access_url_id();
+            if ($access_url_id != -1) {
+                $sql = 'SELECT username, lastname, firstname
                         FROM '.$tbl_user.' user
                         INNER JOIN '.$tbl_user_rel_access_url.' url_user
                         ON (url_user.user_id=user.user_id)
@@ -68,19 +68,19 @@ function search_coachs($needle)
                             AND status=1'.
                         $order_clause.'
                         LIMIT 10';
-			}
-		}
-
-		$rs = Database::query($sql);
-		while ($user = Database :: fetch_array($rs)) {
-			$return .= '<a href="javascript: void(0);" onclick="javascript: fill_coach_field(\''.$user['username'].'\')">'.api_get_person_name($user['firstname'], $user['lastname']).' ('.$user['username'].')</a><br />';
-		}
-	}
-	$xajax_response -> addAssign('ajax_list_coachs', 'innerHTML', api_utf8_encode($return));
-	return $xajax_response;
+            }
+        }
+
+        $rs = Database::query($sql);
+        while ($user = Database :: fetch_array($rs)) {
+            $return .= '<a href="javascript: void(0);" onclick="javascript: fill_coach_field(\''.$user['username'].'\')">'.api_get_person_name($user['firstname'], $user['lastname']).' ('.$user['username'].')</a><br />';
+        }
+    }
+    $xajax_response -> addAssign('ajax_list_coachs', 'innerHTML', api_utf8_encode($return));
+    return $xajax_response;
 }
-$xajax -> processRequests();
 
+$xajax->processRequests();
 $htmlHeadXtra[] = $xajax->getJavascript('../inc/lib/xajax/');
 $htmlHeadXtra[] = "
 <script>
@@ -90,8 +90,8 @@ $(document).ready( function() {
 });
 
 function fill_coach_field (username) {
-	document.getElementById('coach_username').value = username;
-	document.getElementById('ajax_list_coachs').innerHTML = '';
+    document.getElementById('coach_username').value = username;
+    document.getElementById('ajax_list_coachs').innerHTML = '';
 }
 
 function accessSwitcher(accessFromReady) {
@@ -120,7 +120,7 @@ function emptyDuration() {
 </script>";
 
 if (isset($_POST['formSent']) && $_POST['formSent']) {
-	$formSent = 1;
+    $formSent = 1;
 }
 
 $tool_name = get_lang('AddSession');
@@ -210,7 +210,7 @@ if ($form->validate()) {
 
     if ($return == strval(intval($return))) {
         // integer => no error on session creation
-        header('Location: add_courses_to_session.php?id_session='.$return.'&add=true&msg=');
+        header('Location: add_courses_to_session.php?id_session='.$return.'&add=true');
         exit();
     }
 }
@@ -218,7 +218,7 @@ if ($form->validate()) {
 Display::display_header($tool_name);
 
 if (!empty($return)) {
-	echo Display::return_message($return, 'error', false);
+    echo Display::return_message($return, 'error', false);
 }
 
 echo '<div class="actions">';