I'm stucked, please help me!! 1. I inserted a new field on invoice.py 2. It was inserted on table, but it doesn't appears on screen 3. I know that is not calling the file invoice_line_form.xml, because I put purposely an wrong name at the 'expr' and it raises no error when I use the screen.
The whole explanation is here: https://groups.google.com/forum/#!topic/tryton/RLyl9KG6MGc
