Spyce exception

File:/home/mebeldlyao/spyce/sites/mebeldlyao/sites/mebeldlyao/www/_item_view.spy
Message:
AttributeError: 'NoneType' object has no attribute 'get_fields'
Stack: <string>:1, in <module>:
None
/usr/local/spyce/spyceTag.py:85, in eval:
return eval(expr, self._context)
/usr/local/spyce/spyceTag.py:81, in _attrsEval:
attrs[key] = self.eval(expr[1:])
/usr/local/spyce/spyceTag.py:75, in __init__:
self._attrs = self._attrsEval(attrs)
/usr/local/spyce/spyceTag.py:34, in getTag:
tag = self.getTagClass(name)(id, api, self._prefix, context, attrs, paired, parent)
/usr/local/spyce/modules/taglib.py:51, in tagPush:
tag = lib.getTag(self._api, tagname, tagid, context, attr, pair, parent)
_item_view.spy:239, in (main):
<flow:let var="componentry_fields" val="=complementary.get_fields( )" />