Lino needs Twisted version 1.2.0 (not 1.1.1)

With Twisted 1.1.1 you get error messages.

If you get exceptions.NotImplementedError: lino.adamo.twisted_ui.RootResource.render called when one of the demo servers gets a first request, then you have Twisted version 1.1.1. installed. But version 1.2.0 is needed.

How to check which Twisted version is installed:

$ python -c "from twisted.copyright import version; print version"

Possible outputs:

• 1.2.0
  

• 1.1.1
  

• Traceback (most recent call last):
    File "", line 1, in ?
    ImportError: No module named twisted.copyright
  

In spite of what is written at twistedmatrix.com/products/download, I finally installed Twisted manually, using these commands:

tar -xvzf Twisted-1.2.0.tar.gz
cd Twisted-1.2.0
python setup.py build
python setup.py install