diff --git a/workflow/engine/classes/class.pmFunctions.php b/workflow/engine/classes/class.pmFunctions.php
index ac52fbd93..3dd6033bb 100644
--- a/workflow/engine/classes/class.pmFunctions.php
+++ b/workflow/engine/classes/class.pmFunctions.php
@@ -2763,7 +2763,7 @@ function PMFDeleteCase ($caseUid)
  * @return int | $result | Result of the cancelation | Returns 1 if the case is cancel successfully; otherwise, returns 0 if an error occurred.
  *
  */
-function PMFCancelCase ($caseUid, $delIndex, $userUid)
+function PMFCancelCase ($caseUid, $delIndex = null, $userUid = null)
 {
     $ws = new WsBase();
     $result = $ws->cancelCase($caseUid, $delIndex, $userUid);
diff --git a/workflow/engine/methods/cases/cases_SaveData.php b/workflow/engine/methods/cases/cases_SaveData.php
index 59ee9031c..d37f30f47 100644
--- a/workflow/engine/methods/cases/cases_SaveData.php
+++ b/workflow/engine/methods/cases/cases_SaveData.php
@@ -98,7 +98,8 @@ if ($_SERVER['REQUEST_METHOD'] == 'POST' && empty($_POST) && empty($_FILES) && $
 
 try {
     if ($_GET['APP_UID'] !== $_SESSION['APPLICATION']) {
-        throw new Exception( G::LoadTranslation( 'ID_INVALID_APPLICATION_ID_MSG', array ('<a href=\'' . $_SERVER['HTTP_REFERER'] . '\'>{1}</a>',G::LoadTranslation( 'ID_REOPEN' ) ) ) );
+        $urlReferer = empty($_SERVER['HTTP_REFERER']) ? '../cases/casesListExtJsRedirector' : $_SERVER['HTTP_REFERER'];
+        throw new Exception(G::LoadTranslation('ID_INVALID_APPLICATION_ID_MSG', ['<a href=\'' . $urlReferer . '\'>{1}</a>', G::LoadTranslation('ID_REOPEN')]));
     }
 
     $arrayVariableDocumentToDelete = [];