Hi there i'm creating a module to make 2 kinds of invoice with 2 different sequence ...first one with tax and the other with out
i create a Boolean field to check the kind of invoice and when i press Validate i got that error
| ValueError: "invoice_validate() takes at least 4 arguments (4 given)" while evaluating u'invoice_validate()' | 
here is my module code 
the .py file
| from openerp import models, fields, api | 
and here is my view xml file
| <openerp> | 
and here is my sequence file
| <?xml version="1.0" encoding="utf-8"?> | 
may i have some help please ?
