error-category-Id

Reference to product.category.cat_papel not found
ERROR:common.message:Traceback (most recent call last):
  File "/trytond/protocols/jsonrpc.py", line 123, in _marshaled_dispatch
    response['result'] = dispatch_method(method, params)
  File "/trytond/protocols/jsonrpc.py", line 156, in _dispatch
    res = dispatch(*args)
  File "/trytond/protocols/dispatcher.py", line 156, in dispatch
    res = getattr(obj, method)(*args_without_context, **kargs)
  File "/trytond/cache.py", line 98, in call
    result = function(model, *args, **kwargs_origin)
  File "/trytond/model/modelview.py", line 159, in fields_view_get
    result['view_id'])['arch']
  File "/trytond/cache.py", line 98, in call
    result = function(model, *args, **kwargs_origin)
  File "/trytond/model/modelview.py", line 224, in fields_view_get
    result['field_childs'])
  File "/trytond/model/modelview.py", line 382, in _view_look_dom_arch
    fields2 = self.fields_get(fields_def.keys())
  File "/trytond/model/model.py", line 563, in fields_get
    res[field][attr] = encoder.encode(res[field][attr])
  File "/site-packages/simplejson/encoder.py", line 237, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/site-packages/simplejson/encoder.py", line 311, in iterencode
    return _iterencode(o, 0)
  File "/trytond/pyson.py", line 87, in default
    return obj.pyson()
  File "/trytond/pyson.py", line 551, in pyson
    return model_data_obj.get_id(self._module, self._fs_id)
  File "/trytond/cache.py", line 98, in call
    result = function(model, *args, **kwargs_origin)
  File "/trytond/ir/model.py", line 594, in get_id
    % ".".join([module, fs_id]))
Exception: Reference to product.category.cat_papel not found