"Getting started with SVM classification and Text data sets"

Hi all,

I'm trying to start with SVM classification.

I've followed the SVM introduction video with Sonar example.
My problem is a little different, I have mainly text data, I want to classify text entries (with a title and a description) in different categories, by subject.

When I import my CSV data, I configure the class (label) and the attributes.
All my attributes are in "text" format. I have no polynoms. But when I plug a SVM operator of my Data, I have an error about polynoms : "polynomial attributes not supported".

I don't understand why I get this error...

Did I miss something?

Thanks

Loic