Error !

KeyError: 'q'

<%namespace file="partials" name="partials" import="*"/> <%inherit file="site" /> <%def name="main_content()"> <% def ByName(x,y): return cmp(x.val('title').lower(), y.val('title').lower()) #
/srv/limefivedata/limecms/cantec/cantec01/local/lib/python2.7/site-packages/Zope2-2.13.23-py2.7.egg/ZPublisher/HTTPRequest.py, line 1373:
raise KeyError, key
templates/default/search, line 4:
<%
templates/default/site, line 135:
<%self:main_content />
/srv/limefivedata/limecms/cantec/cantec01/local/lib/python2.7/site-packages/Mako-1.0.6-py2.7.egg/mako/runtime.py, line 899:
callable_(context, *args, **kwargs)
/srv/limefivedata/limecms/cantec/cantec01/local/lib/python2.7/site-packages/Mako-1.0.6-py2.7.egg/mako/runtime.py, line 873:
_exec_template(inherit, lclcontext, args=args, kwargs=kwargs)
/srv/limefivedata/limecms/cantec/cantec01/local/lib/python2.7/site-packages/Mako-1.0.6-py2.7.egg/mako/runtime.py, line 838:
**_kwargs_for_callable(callable_, data))
/srv/limefivedata/limecms/cantec/cantec01/local/lib/python2.7/site-packages/Mako-1.0.6-py2.7.egg/mako/template.py, line 462:
return runtime._render(self, self.callable_, args, data)
/var/limecms/cantec/cantec01/cantec-inst/Products/LimeTemplate/LimeTemplate.py, line 704:
html = mytemplate.render(object=object, site=site, request=self.REQUEST, extra=extra.get('kwargs', None), **extra)