really unusual error!

[eluser]2think[/eluser]
You said you copied it out of the userguide, that's not the CI userguide but mac igniter's Formlib right? So make sure you have the formlib library file in the right place (in your application/libraries folder)

Its pretty late here but I think it has something to do with that, read more here http://ellislab.com/forums/viewthread/107861/

The official CodeIgniter form usage can be found here http://ellislab.com/codeigniter/user-gui...elper.html and you'll need the Form Validation class also loaded to do official or standard CI forms.

Final quick tip seeing as you seem to be new, when posting to Ignited Code, its for third-party libraries, so if you post in the thread of whatever library or at least use it in the title/subject, you will likely get faster and better quality help.

Hope some of this helps