diff -r 4fb62d791073 -r 155c29e0ed1c web/views/cwproperties.py
--- a/web/views/cwproperties.py	Tue Sep 15 17:10:58 2015 +0200
+++ b/web/views/cwproperties.py	Fri Sep 18 14:29:53 2015 +0200
@@ -171,7 +171,7 @@
             entity = self.cwprops_rset.get_entity(values[key], 0)
         else:
             entity = self._cw.vreg['etypes'].etype_class('CWProperty')(self._cw)
-            entity.eid = self._cw.varmaker.next()
+            entity.eid = next(self._cw.varmaker)
             entity.cw_attr_cache['pkey'] = key
             entity.cw_attr_cache['value'] = self._cw.vreg.property_value(key)
         return entity