--- a/CallRelatedList.php
+++ b/CallRelatedList.php
@@ -16,7 +16,7 @@
 $action = vtlib_purify($_REQUEST['action']);
 $record = vtlib_purify($_REQUEST['record']);
 $isduplicate = vtlib_purify($_REQUEST['isDuplicate']);
-
+$singlepane_view = 'true';
 if($singlepane_view == 'true' && $action == 'CallRelatedList') {
 	header("Location:index.php?action=DetailView&module=$currentModule&record=$record&parenttab=$category");
 } else {
--- a/DetailView.php
+++ b/DetailView.php
@@ -71,6 +71,7 @@
 }
 
 $smarty->assign('IS_REL_LIST', isPresentRelatedLists($currentModule));
+$singlepane_view = 'true';
 $smarty->assign('SinglePane_View', $singlepane_view);
 
 if($singlepane_view == 'true') {