Error using Express for NodeJS: 'engine' of object #<View> is not a function

I'm new to nodejs and was wondering if anyone knew how to debug this error:

TypeError: Property 'engine' of object #<View> is not a function

I've just installed an express instance after a bit of work getting node/npm installed on an ubuntu box. Any ideas? Here's my stack trace:

500 TypeError: Property 'engine' of object #<View> is not a function
at View.render (/var/www/node_modules/express/lib/view.js:75:8)
at Function.app.render (/var/www/node_modules/express/lib/application.js:504:10)
at ServerResponse.res.render (/var/www/node_modules/express/lib/response.js:676:7)
at exports.index (/var/www/routes/index.js:7:7)
at callbacks (/var/www/node_modules/express/lib/router/index.js:165:11)
at param (/var/www/node_modules/express/lib/router/index.js:139:11)
at pass (/var/www/node_modules/express/lib/router/index.js:146:5)
at Router._dispatch (/var/www/node_modules/express/lib/router/index.js:173:5)
at Object.router (/var/www/node_modules/express/lib/router/index.js:33:10)
at next (/var/www/node_modules/express/node_modules/connect/lib/proto.js:190:15)

Here's routes/index.js 7:7:

res.render('index', { title: 'Express' });