tensorflow/models · error · ValueError

if `sequence_output` is not in encoder output, `latent_outpu

Error message

if `sequence_output` is not in encoder output, `latent_output` must be in encoder output anddecoder must exist.

What it means

Error "if `sequence_output` is not in encoder output, `latent_output` must be in encoder output anddecoder must exist." thrown in tensorflow/models.

Source

Thrown at official/projects/perceiver/modeling/models/classifier.py:126

    self.num_classes = num_classes
    self.head_name = head_name
    self.initializer = initializer
    self._decoder = decoder
    self._network = network

    inputs = self._network.inputs
    outputs = self._network(inputs)

    if 'sequence_output' not in outputs:
      if 'latent_output' in outputs and self._decoder is not None:
        decoder_inputs = {
            'latent_output': outputs['latent_output'],
            'input_mask': inputs['input_mask'],
        }
        decoder_outputs = self._decoder(decoder_inputs)
        sequence_output = decoder_outputs['sequence_output']
      else:
        raise ValueError('if `sequence_output` is not in encoder output, '
                         '`latent_output` must be in encoder output and'
                         'decoder must exist.')
    else:
      sequence_output = outputs['sequence_output']

    cls_inputs = sequence_output

    if initializer is None:
      stddev = 1. / np.sqrt(cls_inputs.shape[-1])
      initializer = tf_keras.initializers.TruncatedNormal(stddev=stddev)

    if cls_head:
      classifier = cls_head
    else:
      classifier = layers.ClassificationHead(
          inner_dim=cls_inputs.shape[-1],
          num_classes=num_classes,
          initializer=initializer,

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/projects/perceiver/modeling/models/classifier.py:126 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/a12fe940b1fb185f. Report an issue: GitHub.