Hola alguien sabe a que se debe este error que me esta generando la vista 
de form de LdM

ERROR *AttributeError: Couldn't find tag (xpath: /tree/field[@name='bom']) 
in parent view!*

[Tue Feb 16 12:25:55 2016] ERROR:trytond.protocols.
dispatcher:Exception calling model.production.process.fields_view_get from 
1@::ffff:127.0.0.1:36741/benalhnos_prod
Traceback (most recent call last):
  File 
"/usr/local/lib/python2.7/dist-packages/trytond/protocols/dispatcher.py", 
line 161, in dispatch
    result = rpc.result(meth(*c_args, **c_kwargs))
  File "/usr/local/lib/python2.7/dist-packages/trytond/model/modelview.py", 
line 239, in fields_view_get
    result['field_childs'])
  File "/usr/local/lib/python2.7/dist-packages/trytond/model/modelview.py", 
line 331, in _view_look_dom_arch
    fields_width=fields_width)
  File "/usr/local/lib/python2.7/dist-packages/trytond/model/modelview.py", 
line 474, in __view_look_dom
    fields_width=fields_width, fields_attrs=fields_attrs)
  File "/usr/local/lib/python2.7/dist-packages/trytond/model/modelview.py", 
line 474, in __view_look_dom
    fields_width=fields_width, fields_attrs=fields_attrs)
  File "/usr/local/lib/python2.7/dist-packages/trytond/model/modelview.py", 
line 474, in __view_look_dom
    fields_width=fields_width, fields_attrs=fields_attrs)
  File "/usr/local/lib/python2.7/dist-packages/trytond/model/modelview.py", 
line 417, in __view_look_dom
    view_type=view_type)
  File "/usr/local/lib/python2.7/dist-packages/trytond/model/modelview.py", 
line 201, in fields_view_get
    result['arch'] = _inherit_apply(result['arch'], view.arch)
  File "/usr/local/lib/python2.7/dist-packages/trytond/model/modelview.py", 
line 73, in _inherit_apply
    % (element2.tag, element2.get('expr')))
*AttributeError: Couldn't find tag (xpath: /tree/field[@name='bom']) in 
parent view!*

Responder a