tensorflow/models · error · ValueError

The Config has been locked. No change is allowed.

Error message

The Config has been locked. No change is allowed.

What it means

Error "The Config has been locked. No change is allowed." thrown in tensorflow/models.

Source

Thrown at official/modeling/hyperparams/base_config.py:278

        logging.warning(
            "The list/tuple don't match the value dictionaries provided. Thus, "
            'the list/tuple is determined by the type annotation and '
            'values provided. This is error-prone.')
        self.__dict__[k] = self._import_config(v, subconfig_type)
      else:
        self.__dict__[k] = self._import_config(v, subconfig_type)
    else:
      self.__dict__[k] = self._import_config(v, subconfig_type)

  def __setattr__(self, k, v):
    if k == 'BUILDER' or k == '_BUILDER':
      raise AttributeError('`BUILDER` is a property and `_BUILDER` is the '
                           'reserved class attribute. We should only assign '
                           '`_BUILDER` at the class level.')

    if k not in self.RESERVED_ATTR:
      if getattr(self, '_locked', False):
        raise ValueError('The Config has been locked. ' 'No change is allowed.')
    self._set(k, v)

  def _override(self, override_dict, is_strict=True):
    """Overrides same method in ParamsDict.

    Also called by ParamsDict methods.

    Args:
      override_dict: dictionary to write to .
      is_strict: If True, not allows to add new keys.

    Raises:
      KeyError: overriding reserved keys or keys not exist (is_strict=True).
    """
    for k, v in sorted(override_dict.items()):
      if k in self.RESERVED_ATTR:
        raise KeyError('The key {!r} is internally reserved. '
                       'Can not be overridden.'.format(k))

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/modeling/hyperparams/base_config.py:278 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of tensorflow/models@e006f5f0d5 (2026-08-24). Data as JSON: /api/errors/5c88cd947e6f51c0. Report an issue: GitHub.