Betwixt -- Reader returning null

[Manohar Karamballi]

Hello All,

I am newbie to Betwixt. I am trying some tutorial programs.
I succesfully executed the part of generating XML from bean instance.

When i tried XML-Bean I am getting null bean instance at command
BetwixtLearner learner = (BetwixtLearner) beanReader.parse(xmlReader);

I registerd class before calling parse method.

Please guide me out of this NULL.

Also pls explain why this registering class is requried?

Manohar