diff --git a/workflow/engine/methods/cases/caseMessageHistory_Ajax.php b/workflow/engine/methods/cases/caseMessageHistory_Ajax.php
index c907db71f..d97c6c00e 100755
--- a/workflow/engine/methods/cases/caseMessageHistory_Ajax.php
+++ b/workflow/engine/methods/cases/caseMessageHistory_Ajax.php
@@ -116,6 +116,10 @@ if ($actionAjax == 'messageHistoryGridList_JXP') {
     $r->data = $aProcesses;
     $r->totalCount = $totalCount;
 
+    if (!isset($r->data[0])) {
+        $r->data[0] = array('APP_MSG_TYPE' => '');
+    }
+
     $r->data[0]["APP_MSG_TYPE"] = (array_key_exists($r->data[0]["APP_MSG_TYPE"], $arrayToTranslation))? $arrayToTranslation[$r->data[0]["APP_MSG_TYPE"]] : $r->data[0]["APP_MSG_TYPE"];
 
     echo G::json_encode( $r );