Uncaught TypeError: undefined is not a function in compiled-templates.js

I was working on first application in ember where the versions of handle bars and ember.js were quite old.

I am using bower to install all dependencies. But once I got error in console while running the application, I specified the version of ember.js to 1.8 and that of handlebar to 2.0.0 in bower.json file. But now as the templates were little old I started getting error like 'Unknown template object: function while using handlebars 2.0'. To resolve this error I used steps mentioned here .

But still I get a new error saying Uncaught TypeError: undefined is not a function. Can anyone please suggest how to upgrade the templates now? Or there is some other way round.