[ckan-dev] No module named common

[Eduardo Bejar]

Hello, 

Continuing installing CKAN 2.2 on an clean install Ubuntu 12.04 64-bit
server. Following the Install from source guide
(http://docs.ckan.org/sv/latest/install-from-source.html), now when I try
step 6:

paster db init -c /etc/ckan/default/development.ini

I get:

ImportError: No module named common

Any ideas about what should I try? Previously this line gave me a
json_preview error which I solved with your suggestions about changing it to
text_preview. 

Thank you for your comments,

Edo