diff --git a/main/inc/ajax/lp.ajax.php b/main/inc/ajax/lp.ajax.php
index a281ed06d9..05dc8e3a96 100755
--- a/main/inc/ajax/lp.ajax.php
+++ b/main/inc/ajax/lp.ajax.php
@@ -8,12 +8,17 @@ use ChamiloSession as Session;
  */
 require_once __DIR__.'/../global.inc.php';
 api_protect_course_script(true);
-$action = $_REQUEST['a'];
+
+$debug = false;
+$action = isset($_REQUEST['a']) ? $_REQUEST['a'] : '';
 
 $course_id = api_get_course_int_id();
-$tbl_lp_item = Database::get_course_table(TABLE_LP_ITEM);
 $sessionId = api_get_session_id();
 
+if ($debug) {
+    error_log('----------lp.ajax-------------- action '.$action);
+}
+
 switch ($action) {
     case 'get_documents':
         $courseInfo = api_get_course_info();
@@ -102,6 +107,8 @@ switch ($action) {
                 }
             }
 
+            $table = Database::get_course_table(TABLE_LP_ITEM);
+
             foreach ($LP_item_list->list as $LP_item) {
                 $params = [];
                 $params['display_order'] = $LP_item->display_order;
@@ -110,7 +117,7 @@ switch ($action) {
                 $params['parent_item_id'] = $LP_item->parent_item_id;
 
                 Database::update(
-                    $tbl_lp_item,
+                    $table,
                     $params,
                     [
                         'id = ? AND c_id = ? ' => [
diff --git a/main/lp/learnpathItem.class.php b/main/lp/learnpathItem.class.php
index 406296895a..b8203f7e30 100755
--- a/main/lp/learnpathItem.class.php
+++ b/main/lp/learnpathItem.class.php
@@ -2015,6 +2015,8 @@ class learnpathItem
     /**
      * Opens/launches the item. Initialises runtime values.
      *
+     * @param bool $allow_new_attempt
+     *
      * @return bool true on success, false on failure
      */
     public function open($allow_new_attempt = false)
@@ -4609,4 +4611,12 @@ class learnpathItem
 
         return true;
     }
+
+    /**
+     * @return int
+     */
+    public function getLastScormSessionTime()
+    {
+        return $this->last_scorm_session_time;
+    }
 }
diff --git a/main/lp/lp_ajax_initialize.php b/main/lp/lp_ajax_initialize.php
index 00a1cc96d4..c1d26ecb7f 100755
--- a/main/lp/lp_ajax_initialize.php
+++ b/main/lp/lp_ajax_initialize.php
@@ -28,10 +28,10 @@ require_once __DIR__.'/../inc/global.inc.php';
  */
 function initialize_item($lp_id, $user_id, $view_id, $next_item)
 {
-    global $debug;
+    $debug = 0;
     $return = '';
-    if ($debug > 0) {
-        error_log('In initialize_item('.$lp_id.','.$user_id.','.$view_id.','.$next_item.')', 0);
+    if ($debug) {
+        error_log('In initialize_item('.$lp_id.','.$user_id.','.$view_id.','.$next_item.')');
     }
     /*$item_id may be one of:
      * -'next'
@@ -42,18 +42,18 @@ function initialize_item($lp_id, $user_id, $view_id, $next_item)
      */
     $mylp = learnpath::getLpFromSession(api_get_course_id(), $lp_id, $user_id);
     $mylp->set_current_item($next_item);
-    if ($debug > 1) {
-        error_log('In initialize_item() - new item is '.$next_item, 0);
+    if ($debug) {
+        error_log('In initialize_item() - new item is '.$next_item);
     }
     $mylp->start_current_item(true);
 
     if (is_object($mylp->items[$next_item])) {
-        if ($debug > 1) {
+        if ($debug) {
             error_log('In initialize_item - recovering existing item object '.$next_item, 0);
         }
         $mylpi = $mylp->items[$next_item];
     } else {
-        if ($debug > 1) {
+        if ($debug) {
             error_log('In initialize_item - generating new item object '.$next_item, 0);
         }
         $mylpi = new learnpathItem($next_item, $user_id);
@@ -170,11 +170,10 @@ function initialize_item($lp_id, $user_id, $view_id, $next_item)
 
     $mylp->set_error_msg('');
     $mylp->prerequisites_match(); // Check the prerequisites are all complete.
-    if ($debug > 1) {
+    if ($debug) {
         error_log('Prereq_match() returned '.htmlentities($mylp->error), 0);
-    }
-    if ($debug > 1) {
         error_log("return = $return ");
+        error_log("mylp->lp_view_session_id: ".$mylp->lp_view_session_id);
     }
 
     return $return;
diff --git a/main/lp/lp_content.php b/main/lp/lp_content.php
index ef58768af7..ee171ea7bb 100755
--- a/main/lp/lp_content.php
+++ b/main/lp/lp_content.php
@@ -14,13 +14,13 @@ require_once __DIR__.'/../inc/global.inc.php';
 
 $debug = 0;
 if ($debug > 0) {
-    error_log('New lp - In lp_content.php', 0);
+    error_log('New lp - In lp_content.php');
 }
 if (empty($lp_controller_touched)) {
     if ($debug > 0) {
-        error_log('New lp - In lp_content.php - Redirecting to lp_controller', 0);
+        error_log('New lp - In lp_content.php - Redirecting to lp_controller');
     }
-    header('location: lp_controller.php?action=content&lp_id='.intval($_REQUEST['lp_id']).'&item_id='.intval($_REQUEST['item_id']).'&'.api_get_cidreq());
+    header('Location: lp_controller.php?action=content&lp_id='.intval($_REQUEST['lp_id']).'&item_id='.intval($_REQUEST['item_id']).'&'.api_get_cidreq());
     exit;
 }
 
@@ -35,7 +35,9 @@ $lp_item_id = $learnPath->get_current_item_id();
  */
 $src = '';
 if ($debug > 0) {
-    error_log('New lp - In lp_content.php - Looking for file url', 0);
+    error_log('New lp - In lp_content.php - Looking for file url');
+    error_log("lp_type $lp_type");
+    error_log("lp_item_id $lp_item_id");
 }
 
 $list = $learnPath->get_toc();
@@ -93,7 +95,7 @@ if ($dir) {
 }
 
 if ($debug > 0) {
-    error_log('New lp - In lp_content.php - File url is '.$src, 0);
+    error_log('New lp - In lp_content.php - File url is '.$src);
 }
 $learnPath->set_previous_item($lp_item_id);
 
@@ -114,7 +116,7 @@ $save_setting = api_get_setting('show_navigation_menu');
 global $_setting;
 $_setting['show_navigation_menu'] = false;
 if ($debug > 0) {
-    error_log('New LP - In lp_content.php - Loading '.$src, 0);
+    error_log('New LP - In lp_content.php - Loading '.$src);
 }
 Session::write('oLP', $learnPath);
 header("Location: ".urldecode($src));