diff --git a/workflow/engine/methods/cases/casesDemo.php b/workflow/engine/methods/cases/casesDemo.php
index 589b94255..6cc3225cd 100644
--- a/workflow/engine/methods/cases/casesDemo.php
+++ b/workflow/engine/methods/cases/casesDemo.php
@@ -96,7 +96,7 @@ try {
         $objTask = new Task();
         $aTask = $objTask->load($val['TAS_UID']);
         $delegations[$key]['TAS_TITLE'] = $aTask['TAS_TITLE'];
-        if ($val['USR_UID'] != - 1) {
+        if ($val['USR_UID'] != - 1 && $val['USR_UID'] != '') {
             $oUser->load( $val['USR_UID'] );
             $delegations[$key]['USR_NAME'] = $oUser->getUsrFirstname() . ' ' . $oUser->getUsrLastname();
         } else {
diff --git a/workflow/engine/templates/cases/casesDemo.html b/workflow/engine/templates/cases/casesDemo.html
index 976dccbff..11b7bec2b 100644
--- a/workflow/engine/templates/cases/casesDemo.html
+++ b/workflow/engine/templates/cases/casesDemo.html
@@ -443,7 +443,7 @@ font-weight:normal;
 	<li class="debug-child">
 	<div onmouseout="krumo.out(this);" onmouseover="krumo.over(this);" onclick="krumo.toggle(this);" class="debug-element debug-opened">
 			<a class="debug-name">{$id}</a>&nbsp;
-	  		<strong class="debug-string">{$data}</strong>
+	  		<strong class="debug-string">{if $data|is_array}{$data|@debug_print_var}{else}{$data}{/if}</strong>
 	</div>
   </li>
 	{/foreach}