diff --git a/workflow/engine/methods/cases/cases_Step.php b/workflow/engine/methods/cases/cases_Step.php
index 1fc7baa2c..cce1e8e2b 100755
--- a/workflow/engine/methods/cases/cases_Step.php
+++ b/workflow/engine/methods/cases/cases_Step.php
@@ -188,7 +188,7 @@ $aRequiredFields = array(
     'PROCESS'       => $Fields['APP_DATA']['PROCESS'],
     'TASK'          => $Fields['APP_DATA']['TASK'],
     'INDEX'         => $Fields['APP_DATA']['INDEX'],
-    'TRIGGER_DEBUG' => $Fields['APP_DATA']['TRIGGER_DEBUG']
+    'TRIGGER_DEBUG' => isset($Fields['APP_DATA']['TRIGGER_DEBUG']) ? $Fields['APP_DATA']['TRIGGER_DEBUG']:array()
 );
 
 $oHeadPublisher->addScriptCode('var __dynaformSVal__ = \'' . base64_encode(serialize($aRequiredFields)) . '\'; ');