tensorflow/models · error · ValueError

Unsupported mixing mechanism: %s

Error message

Unsupported mixing mechanism: %s

What it means

Error "Unsupported mixing mechanism: %s" thrown in tensorflow/models.

Source

Thrown at official/nlp/modeling/networks/fnet.py:348

      logging.warn(warn_string)

    return cls(**config)

  def _init_mixing_sublayer(self, layer: int):
    """Initializes config-dependent mixing sublayer."""
    if self._config['mixing_mechanism'] == layers.MixingMechanism.FOURIER:
      mixing_sublayer = layers.FourierTransformLayer(
          use_fft=self._config['use_fft'], name='fourier_transform')
    elif self._config['mixing_mechanism'] == layers.MixingMechanism.HARTLEY:
      mixing_sublayer = layers.HartleyTransformLayer(
          use_fft=self._config['use_fft'], name='hartley_transform')
    elif self._config['mixing_mechanism'] == layers.MixingMechanism.LINEAR:
      mixing_sublayer = layers.LinearTransformLayer(
          kernel_initializer=tf_utils.clone_initializer(
              self._config['initializer']),
          name='linear_transform')
    else:
      raise ValueError('Unsupported mixing mechanism: %s' %
                       self._config['mixing_mechanism'])

    return mixing_sublayer

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/nlp/modeling/networks/fnet.py:348 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/1c8d29a2099aa931. Report an issue: GitHub.