It does not work the wizard to justify states

[Pau Gangonells (Tecnoba)]

This is the error reporting
Environment Information :
System : Linux-3.2.0-32-generic-pae-i686-with-Ubuntu-12.04-precise
OS Name : posix
Distributor ID: Ubuntu
Description: Ubuntu 12.04.1 LTS
Release: 12.04
Codename: precise
Operating System Release : 3.2.0-32-generic-pae
Operating System Version : #51-Ubuntu SMP Wed Sep 26 21:54:23 UTC 2012
Operating System Architecture : 32bit
Operating System Locale : ca_ES.UTF-8
Python Version : 2.7.3
OpenERP-Client Version : 6.1-20120810-233427
Last revision No. & ID :Bazaar Package not Found !Traceback (most recent call last):
  File "/opt/openerp/server/openerp/service/netrpc_server.py", line 64, in run
    result = netsvc.dispatch_rpc(msg[0], msg[1], msg[2:])
  File "/opt/openerp/server/openerp/netsvc.py", line 360, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/opt/openerp/server/openerp/service/web_services.py", line 617, in dispatch
    res = fn(db, uid, *params)
  File "/opt/openerp/server/openerp/service/web_services.py", line 641, in exp_execute
    return self._execute(db, uid, wiz_id, datas, action, context)
  File "/opt/openerp/server/openerp/service/web_services.py", line 623, in _execute
    return wiz.execute(db, uid, self.wiz_datas[wiz_id], action, context)
  File "/opt/openerp/server/openerp/wizard/__init__.py", line 185, in execute
    res = self.execute_cr(cr, uid, data, state, context)
  File "/opt/openerp/server/openerp/wizard/__init__.py", line 90, in execute_cr
    res['action'] = result_def['action'](self, cr, uid, data, context)
  File "/opt/openerp/server/openerp/addons/school_attendance/school_attendance.py", line 960, in _open_wizard
    result = act_obj.read(cr, uid, [id], [])[0]
  File "/opt/openerp/server/openerp/addons/hr/hr_department.py", line 94, in read
    res = super(ir_action_window, self).read(cr, uid, select, fields=fields, context=context, load=load)
  File "/opt/openerp/server/openerp/osv/orm.py", line 3416, in read
    result = self._read_flat(cr, user, select, fields, context, load)
  File "/opt/openerp/server/openerp/osv/orm.py", line 3539, in _read_flat
    res2 = self._columns[f].get(cr, self, ids, f, user, context=context, values=res)
  File "/opt/openerp/server/openerp/osv/fields.py", line 1129, in get
    result = self._fnct(obj, cr, uid, ids, name, self._arg, context)
  File "/opt/openerp/server/openerp/addons/base/ir/ir_actions.py", line 242, in _search_view
    form_arch = self.pool.get(act.res_model).fields_view_get(cr, uid, False, 'form', context)
  File "/opt/openerp/server/openerp/osv/orm.py", line 2153, in fields_view_get
    xarch, xfields = self.__view_look_dom_arch(cr, user, result['arch'], view_id, context=ctx)
  File "/opt/openerp/server/openerp/osv/orm.py", line 1793, in __view_look_dom_arch
    fields_def = self.__view_look_dom(cr, user, node, view_id, False, fields, context=context)
  File "/opt/openerp/server/openerp/osv/orm.py", line 1742, in __view_look_dom
    fields.update(self.__view_look_dom(cr, user, f, view_id, in_tree_view, model_fields, context))
  File "/opt/openerp/server/openerp/osv/orm.py", line 1691, in __view_look_dom
    transfer_field_to_modifiers(field, modifiers)
  File "/opt/openerp/server/openerp/osv/orm.py", line 84, in transfer_field_to_modifiers
    if default_values[modif[0]] != modif[1]:
KeyError: 'r'