From 34b7c1003b87a29a174994a85c83e8bbc76e9c10 Mon Sep 17 00:00:00 2001
From: Jose Gonzalez <jose.gonzalez@artica.es>
Date: Mon, 8 Mar 2021 11:20:50 +0100
Subject: [PATCH] Fixed error with sorting

---
 .../include/javascript/tree/TreeController.js   | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/pandora_console/include/javascript/tree/TreeController.js b/pandora_console/include/javascript/tree/TreeController.js
index 38e9e7cedd..ee8de7a5d9 100644
--- a/pandora_console/include/javascript/tree/TreeController.js
+++ b/pandora_console/include/javascript/tree/TreeController.js
@@ -1077,13 +1077,16 @@ var TreeController = {
                           var rawTree = Object.values(data.tree);
                           // Sorting tree by description (services.treeview_services.php).
                           rawTree.sort(function(a, b) {
-                            var x = a.elementDescription.toLowerCase();
-                            var y = b.elementDescription.toLowerCase();
-                            if (x < y) {
-                              return -1;
-                            }
-                            if (x > y) {
-                              return 1;
+                            // Only the services are ordered since only they have the elementDescription property.
+                            if (a.elementDescription && b.elementDescription) {
+                              var x = a.elementDescription.toLowerCase();
+                              var y = b.elementDescription.toLowerCase();
+                              if (x < y) {
+                                return -1;
+                              }
+                              if (x > y) {
+                                return 1;
+                              }
                             }
                             return 0;
                           });