--- report_xml.py.old	2014-01-20 12:46:48.851338138 +0100
+++ report_xml.py	2014-01-20 12:31:52.351318260 +0100
@@ -384,10 +384,11 @@
                 doc = etree.XML(res['arch'])
                 deferred_node = doc.xpath("//field[@name='deferred']")
                 modifiers = {'invisible': True}
-                transfer_modifiers_to_node(modifiers, deferred_node[0])
-                deferred_limit_node = doc.xpath("//field[@name='deferred_limit']")
-                transfer_modifiers_to_node(modifiers, deferred_limit_node[0])
-                res['arch'] = etree.tostring(doc)
+                if len(deferred_node) > 0:
+	                transfer_modifiers_to_node(modifiers, deferred_node[0])
+	                deferred_limit_node = doc.xpath("//field[@name='deferred_limit']")
+	                transfer_modifiers_to_node(modifiers, deferred_limit_node[0])
+	                res['arch'] = etree.tostring(doc)
             ############################################
         return res