Voucher Entry error when create entries with analytic account

Voucher Entry cann't create entries with analytic account, here's error messages :

Traceback (most recent call last):
  File "/home/opix/openerp5_alpha/server/bin/netsvc.py", line 257, in _dispatch
    r = m(*params)
  File "/home/opix/openerp5_alpha/server/bin/addons/base_module_record/base_module_record.py", line 212, in execute
    res = fnct(*args, **argv)
  File "/home/opix/openerp5_alpha/server/bin/service/web_services.py", line 375, in execute
    res = service.execute(db, uid, object, method, *args)
  File "/home/opix/openerp5_alpha/server/bin/osv/osv.py", line 110, in execute
    res = pool.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/opix/openerp5_alpha/server/bin/osv/osv.py", line 85, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/opix/openerp5_alpha/server/bin/addons/account_voucher/voucher.py", line 172, in proforma_voucher
    self.action_move_line_create(cr, uid, ids)
  File "/home/opix/openerp5_alpha/server/bin/addons/account_voucher/voucher.py", line 238, in action_move_line_create
    iml = self._get_analityc_lines(cr, uid, inv.id)
  File "/home/opix/openerp5_alpha/server/bin/addons/account_voucher/voucher.py", line 223, in _get_analityc_lines
    'journal_id': self._get_journal(cr, uid, inv.type),
  File "/home/opix/openerp5_alpha/server/bin/addons/account_voucher/voucher.py", line 51, in _get_journal
    type_inv = context.get('type', 'rec_voucher')
AttributeError: 'str' object has no attribute 'get'