Index: class.tx_templavoila_api.php
===================================================================
--- class.tx_templavoila_api.php	(revision 28850)
+++ class.tx_templavoila_api.php	(working copy)
@@ -1456,7 +1456,7 @@
 								'section' => $fieldData['section'],
 								'data' => array(),
 								'subElements' => array(),
-								'isMapped' => is_array($templateMappingArr['MappingInfo']['ROOT']['el'][$fieldKey])
+								'isMapped' => !empty($templateMappingArr['MappingInfo']['ROOT']['el'][$fieldKey]['MAP_EL'])
 							);
 							foreach($lKeys as $lKey)	{
 								foreach($vKeys as $vKey)	{