diff --git a/core/src/core/classes/class.AJXP_Utils.php b/core/src/core/classes/class.AJXP_Utils.php
index 6a276278ac..32848eb343 100644
--- a/core/src/core/classes/class.AJXP_Utils.php
+++ b/core/src/core/classes/class.AJXP_Utils.php
@@ -704,7 +704,8 @@ public static function convertBytes($value)
             return intval($value);
         } else {
             $value_length = strlen($value);
-            $qty = substr($value, 0, $value_length - 1);
+            $value = str_replace(",",".", $value);
+            $qty = floatval(substr($value, 0, $value_length - 1));
             $unit = strtolower(substr($value, $value_length - 1));
             switch ($unit) {
                 case 'k':
diff --git a/core/src/core/classes/class.AJXP_VarsFilter.php b/core/src/core/classes/class.AJXP_VarsFilter.php
index 2a52a505fe..a40ae32474 100644
--- a/core/src/core/classes/class.AJXP_VarsFilter.php
+++ b/core/src/core/classes/class.AJXP_VarsFilter.php
@@ -33,7 +33,7 @@ class AJXP_VarsFilter
      * Calls the vars.filter hooks.
      * @static
      * @param $value
-     * @param AbstractAjxpUser $resolveUser
+     * @param AbstractAjxpUser|String $resolveUser
      * @return mixed|string
      */
     public static function filter($value, $resolveUser = null)
@@ -41,7 +41,12 @@ public static function filter($value, $resolveUser = null)
         if (is_string($value) && strpos($value, "AJXP_USER")!==false) {
             if (AuthService::usersEnabled()) {
                 if($resolveUser != null){
-                    $value = str_replace("AJXP_USER", $resolveUser->getId(), $value);
+                    if(is_string($resolveUser)){
+                        $resolveUserId = $resolveUser;
+                    } else {
+                        $resolveUserId = $resolveUser->getId();
+                    }
+                    $value = str_replace("AJXP_USER", $resolveUserId, $value);
                 }else{
                     $loggedUser = AuthService::getLoggedUser();
                     if ($loggedUser != null) {
@@ -62,7 +67,11 @@ public static function filter($value, $resolveUser = null)
         if (is_string($value) && strpos($value, "AJXP_GROUP_PATH")!==false) {
             if (AuthService::usersEnabled()) {
                 if($resolveUser != null){
-                    $loggedUser = $resolveUser;
+                    if(is_string($resolveUser) && AuthService::userExists($resolveUser)){
+                        $loggedUser = ConfService::getConfStorageImpl()->createUserObject($resolveUser);
+                    }else{
+                        $loggedUser = $resolveUser;
+                    }
                 }else{
                     $loggedUser = AuthService::getLoggedUser();
                 }