diff --git a/src/main/webapp/app/components/cnrtree/cnrtree.directive.js b/src/main/webapp/app/components/cnrtree/cnrtree.directive.js
index 2e9e345a3..be3bf6558 100644
--- a/src/main/webapp/app/components/cnrtree/cnrtree.directive.js
+++ b/src/main/webapp/app/components/cnrtree/cnrtree.directive.js
@@ -32,11 +32,14 @@
         };
 
         $scope.$watch("filter", function(newVal, oldVal, scope) {
-            if (newVal === '') {
-                $scope.treeInstance.jstree(true).clear_search ();
-                $scope.treeInstance.jstree(true).close_all();
-            } else
-                $scope.treeInstance.jstree(true).search(newVal, true, true);
+            if ($scope.treeInstance) {
+                if (newVal === '') {
+                    $scope.treeInstance.jstree(true).clear_search ();
+                    $scope.treeInstance.jstree(true).close_all();
+                } else {
+                    $scope.treeInstance.jstree(true).search(newVal, true, true);
+                }
+            }
         })
 
         $scope.jsonlist = [];
diff --git a/src/main/webapp/app/components/task-details/task-details.directive.js b/src/main/webapp/app/components/task-details/task-details.directive.js
index 0588369cc..b0bb1d122 100644
--- a/src/main/webapp/app/components/task-details/task-details.directive.js
+++ b/src/main/webapp/app/components/task-details/task-details.directive.js
@@ -27,7 +27,7 @@
 						resolve: {
 							variables: function() {
 								//escludo le variabili di tipo "_json"
-								return variables.filter(variable => !variable.name.includes("_json"));
+								return variables.filter(function(variable) { return !variable.name.includes("_json");});
 							},
 							title: function() {
 								return title;
diff --git a/src/main/webapp/app/pages/search/search.controller.js b/src/main/webapp/app/pages/search/search.controller.js
index 0af005dd2..f6d6c5151 100644
--- a/src/main/webapp/app/pages/search/search.controller.js
+++ b/src/main/webapp/app/pages/search/search.controller.js
@@ -1,5 +1,5 @@
 (function() {
-  "use strict";
+  'use strict';
 
   angular.module("sprintApp").controller("SearchController", SearchController);
 
@@ -32,9 +32,10 @@
       $location.search(vm.searchParams);
 
       //ripulisco i valori con null(tipo quando annullo la data selezionata)
-      Object.keys(vm.searchParams).forEach(
-        key => vm.searchParams[key] == null && delete vm.searchParams[key]
-      );
+      Object.keys(vm.searchParams).forEach(function(key) {
+          if(vm.searchParams[key] == null)
+            delete vm.searchParams[key];
+      });
       dataService.processInstances.search(vm.searchParams).then(
         function(response) {
           vm.results = utils.refactoringVariables(response.data.data);