I have installed this module, and when I m trying to open the products form I got this error.

AttributeError: View definition error for inherited view 'account_anglo_saxon.product_normal_form_view' on 'product.product' model: Element '<xpath expr="/form/notebook/page/field[@name='property_account_expense']">' not found in parent view 'product.product_normal_form_view'

Thanks in advance

I've had a bit of this lately. I think there was a commit on the server which changed the way views inherit. Before we used to use the base view, but now it seems you use the view the original field appears in. However that said I have account anglosaxon latest revs installed on my system and it works fine, so more likely it is a combination of the views of the modules you have installed, or you are using old code.