excel library problems

[eluser]smilie[/eluser]
It seems you are getting this error simply by enabling the library.
My guess is that library is not written to work in CI. Meaning, on library load your library already expects some params. So - either re-write library or look at http://codeigniter.com/wiki/Simple_Excel_Plugin/

I am using this one, you simple put HTML to the plugin and off you go :-)

Cheers,
Smilie