Traceback (most recent call last):
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/netsvc.py", line 299, in dispatch
    result = LocalService(service_name)(method, *params)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/netsvc.py", line 77, in __call__
    return getattr(self, method)(*params)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/service/web_services.py", line 633, in execute
    return self._execute(db, uid, wiz_id, datas, action, context)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/service/web_services.py", line 613, in _execute
    return wiz.execute(db, uid, self.wiz_datas[wiz_id], action, context)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/wizard/__init__.py", line 178, in execute
    res = self.execute_cr(cr, uid, data, state, context)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/wizard/__init__.py", line 73, in execute_cr
    action_res = action(self, cr, uid, data, context)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/base/module/wizard/wizard_module_upgrade.py", line 92, in _upgrade_module
    db, pool = pooler.restart_pool(cr.dbname, update_module=True)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/pooler.py", line 61, in restart_pool
    return get_db_and_pool(db_name, force_demo, status, update_module=update_module)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/pooler.py", line 40, in get_db_and_pool
    addons.load_modules(db, force_demo, status, update_module)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/__init__.py", line 736, in load_modules
    r = load_module_graph(cr, graph, status, report=report)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/__init__.py", line 576, in load_module_graph
    register_class(package.name)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/__init__.py", line 398, in register_class
    imp.load_module(m, *fm)
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/l10n_ar_account_invoice_menu/__init__.py", line 24, in <module>
    import wizard
  File "/usr/lib/python2.6/dist-packages/uno.py", line 262, in _uno_import
    return _g_delegatee( name, *optargs, **kwargs )
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/l10n_ar_account_invoice_menu/wizard/__init__.py", line 24, in <module>
    import wizard_invoice_onshipping
  File "/usr/lib/python2.6/dist-packages/uno.py", line 262, in _uno_import
    return _g_delegatee( name, *optargs, **kwargs )
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/addons/l10n_ar_account_invoice_menu/wizard/wizard_invoice_onshipping.py", line 178, in <module>
    make_invoice_onshipping("ou.stock.invoice_onshipping") # MODIFICADO # make_invoice_onshipping("stock.invoice_onshipping")
  File "/usr/local/lib/python2.6/dist-packages/openerp-server/wizard/__init__.py", line 47, in __init__
    assert not netsvc.service_exist('wizard.'+name), 'The wizard "%s" already exists!'%name
AssertionError: The wizard "ou.stock.invoice_onshipping" already exists!