diff --git a/workflow/engine/bin/tasks/cliUpgrade.php b/workflow/engine/bin/tasks/cliUpgrade.php
index 3b59a837b..152e1db20 100755
--- a/workflow/engine/bin/tasks/cliUpgrade.php
+++ b/workflow/engine/bin/tasks/cliUpgrade.php
@@ -99,7 +99,7 @@ function run_upgrade($command, $args)
     CLI::logging("Clearing cache...\n");
     if (defined('PATH_C')) {
         G::rm_dir(PATH_C);
-        mkdir(PATH_C, 0777, true);
+        G::mk_dir(PATH_C, 0777);
     }
     $workspaces = get_workspaces_from_args($command);
     $count = count($workspaces);
diff --git a/workflow/engine/classes/class.pmFunctions.php b/workflow/engine/classes/class.pmFunctions.php
index 3db4080f0..9e5b1c849 100755
--- a/workflow/engine/classes/class.pmFunctions.php
+++ b/workflow/engine/classes/class.pmFunctions.php
@@ -1963,7 +1963,8 @@ function PMFDerivateCase ($caseId, $delIndex, $bExecuteTriggersBeforeAssignment
     $ws = new wsBase();
     $result = $ws->derivateCase( $sUserLogged, $caseId, $delIndex, $bExecuteTriggersBeforeAssignment );
     if (isset( $result->status_code )) {
-        return $result->status_code;
+        $resultArray = (array)$result;
+        return $result['status_code'];
     } else {
         return 0;
     }