Sorry resending after a small edit. sent to wrong list by msitake. I copied some code from an existing site of mine to a new machine and boom.... does not work anymore :) the code is based on the guard example... : It seems the code that fails is: def render_sessionId(self, context, data): sess = inevow.ISession(context) return context.tag[sess.uid] The complete trace follows. Any ideas? I probably forget to install something... did I? this is gentoo standard ebuilds for python, twisted and nevow: 2005/01/04 16:31 EST [HTTPChannel,0,127.0.0.1] Traceback (most recent call last): File "/usr/lib/python2.3/site-packages/twisted/protocols/http.py", line 557, in requestReceived self.process() File "/usr/lib/python2.3/site-packages/nevow/appserver.py", line 129, in process return self.site.getResourceFor( File "/usr/lib/python2.3/site-packages/twisted/internet/defer.py", line 214, in addCallback callbackKeywords=kw) File "/usr/lib/python2.3/site-packages/twisted/internet/defer.py", line 205, in addCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/lib/python2.3/site-packages/twisted/internet/defer.py", line 338, in _runCallbacks self.result = callback(self.result, *args, **kw) File "/usr/lib/python2.3/site-packages/nevow/appserver.py", line 132, in <lambda> lambda resource: inevow.IResource(resource).renderHTTP(self) File "/usr/lib/python2.3/site-packages/nevow/rend.py", line 363, in renderHTTP return self.flattenFactory(doc, ctx, writer, finisher) File "/usr/lib/python2.3/site-packages/nevow/rend.py", line 227, in deferFlattenFactory return deferflatten(stan, ctx, writer).addCallback(finisher) File "/usr/lib/python2.3/site-packages/nevow/rend.py", line 223, in deferflatten drive() File "/usr/lib/python2.3/site-packages/nevow/rend.py", line 207, in drive deferred, returner = iterable.next() File "/usr/lib/python2.3/site-packages/nevow/flat/ten.py", line 71, in iterflatten for item in gen: File "/usr/lib/python2.3/site-packages/nevow/flat/flatstan.py", line 89, in TagSerializer yield serialize(toBeRenderedBy,context) File "/usr/lib/python2.3/site-packages/nevow/flat/ten.py", line 53, in serialize return serializer(obj, context) File "/usr/lib/python2.3/site-packages/nevow/flat/flatstan.py", line 215, in DirectiveSerializer return serialize(renderer, context) File "/usr/lib/python2.3/site-packages/nevow/flat/ten.py", line 53, in serialize return serializer(obj, context) File "/usr/lib/python2.3/site-packages/nevow/flat/flatstan.py", line 199, in MethodSerializer return FunctionSerializer(original, context, nocontext) File "/usr/lib/python2.3/site-packages/nevow/flat/flatstan.py", line 184, in FunctionSerializer result = original(context, data) File "<string>", line 209, in render_sessionId File "/usr/lib/python2.3/site-packages/nevow/compy.py", line 73, in __call__ raise CannotAdapt("%s (type %s) cannot be adapted to %s." % nevow.compy.CannotAdapt: WovenContext(tag=Tag('', specials={'render': Unset}, children=[''])) (type nevow.context.WovenContext) cannot be adapted to <class 'nevow.inevow.ISession'>.