Hello, i'm trying to use the FSSession to have a little shopping cart for e-commerce. I can initialize the dictionary named "cart" and it is created in the datafile. When i try to update it with the data from my form i get the error: Zope Error Zope has encountered an error while publishing this resource. Error Type: AttributeError Error Value: 'None' object has no attribute 'update' For curiosity i tried the example bundled in README.txt of the FSSEssion and macically i obtain the same error. this is the code i used: <dtml-call FSSession> <dtml-unless "FSSession.has_key('cart')"> <dtml-call "FSSession.set('cart',{})"> </dtml-unless> <dtml-comment> ##### <dtml-var "REQUEST.form"><br> <dtml-in "REQUEST.form.items()"> <dtml-var sequence-item> </dtml-in> This is only to check that the form passes the values correctly ######## </dtml-comment> <dtml-call "FSSession['carrello'].update(REQUEST.form)"> Can anyone help me? Thanks ATIS