Fatal error: Call to a member function elapsed_time()

[eluser]tonanbarbarian[/eluser]
I notice from the filepath of the error that you are trying to create a plugin in Joomla! for the Community Builder component.
The issue that you are having may be how you are integrating code igniter with CB/Joomla!

I would recommend that you first build your app/plugin to run stand alone and get it working in a normal CI environment, then work on getting the integration to work

If you have already got the app to work stand alone then ... not sure how much more i can help ... yet.
I say yet because i plan to be integrating a CI app in Joomla! over the next week or so