tensorflow/models · error · ValueError

Unknown block type {}

Error message

Unknown block type {}

What it means

Error "Unknown block type {}" thrown in tensorflow/models.

Source

Thrown at official/projects/movinet/modeling/movinet.py:533

          stochastic_depth_idx += 1
      elif isinstance(block, HeadSpec):
        layer_obj = movinet_layers.Head(
            project_filters=block.project_filters,
            conv_type=self._conv_type,
            activation=self._activation,
            kernel_initializer=self._kernel_initializer,
            kernel_regularizer=self._kernel_regularizer,
            batch_norm_layer=self._norm,
            batch_norm_momentum=self._norm_momentum,
            batch_norm_epsilon=self._norm_epsilon,
            use_sync_bn=self._use_sync_bn,
            average_pooling_type=self._average_pooling_type,
            state_prefix='state_head',
            name='head')
        x, states = layer_obj(x, states=states)
        endpoints['head'] = x
      else:
        raise ValueError('Unknown block type {}'.format(block))

    outputs = (endpoints, states) if self._output_states else endpoints

    return inputs, outputs

  def _get_initial_state_shapes(
      self,
      block_specs: Sequence[BlockSpec],
      input_shape: Union[Sequence[int], tf.Tensor],
      use_positional_encoding: bool = False) -> Dict[str, Sequence[int]]:
    """Generates names and shapes for all input states.

    Args:
      block_specs: sequence of specs used for creating a model.
      input_shape: the expected 5D shape of the image input.
      use_positional_encoding: whether the model will use positional encoding.

    Returns:

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/projects/movinet/modeling/movinet.py:533 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/14a2027bc1f4d168. Report an issue: GitHub.