From time to time I am getting this error..I am using alpha version

Session was disposed of or closed
Object name: 'ISession'.

when does it arise? why?

thks

I am getting this error in this scenario..

Say,i moved from page one to another,then another,and then user clicks back button on browser,comes to first page and clicks save..then i get the error..
Session was disposed of or closed
Object name: 'ISession'

in an ASP.NET app, i can say from my own experience that this type of error generally happens when you are trying to load a lazy collection in an object that was opened in a past session. there is so much more to the problem, though, so i'm assuming alot. if you think you are running into such a scenario, then you need to look at the session.Lock() method as one of probably three or four ways to fix this error.

-devon