account_voucher : onchange_journal() takes at least 12 arguments (10 given).

Install account_voucher

Go to Accounting -> Journal Entries -> Journal Voucher.

Select the journal other than "Miscellaneous Journal (EUR)" and then select the "Partner".

It will gives the traceback :

Traceback (most recent call last):
  File "/home/mdi/openerp/openerp_trunk/openobject-server/openerp/osv/osv.py", line 120, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/mdi/openerp/openerp_trunk/openobject-server/openerp/osv/osv.py", line 172, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/mdi/openerp/openerp_trunk/openobject-server/openerp/osv/osv.py", line 163, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/mdi/openerp/openerp_trunk/openobject-addons/account_voucher/account_voucher.py", line 451, in onchange_journal_voucher
    vals = self.onchange_journal(cr, uid, ids, journal_id, line_ids, tax_id, partner_id, company_id, context)
TypeError: onchange_journal() takes at least 12 arguments (10 given)