Hi all, I am installing openstack grizzly on redhat 6.4. when I created a instances successfully and tried to access it via vnc, it had no response. the log file xvpvncproxy.log shows an error as below: Host: 172.16.2.91:6081 Referer: http://172.16.2.91/dashboard/project/instances/e1f21ec1-7dfd-452b-ab3e-88ecfabc0929/ User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.64 Safari/537.31 2013-07-29 10:35:18.231 3111 INFO nova.XCP VNC Proxy.wsgi.server [-] Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/eventlet/wsgi.py", line 393, in handle_one_response for data in result: TypeError: 'NoneType' object is not iterable Anyone has encountered the same question before? thanks in advance. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20130729/b06370bd/attachment.html>