tensorflow/models · error · ValueError

More than one maxpool should be specified in SPP block

Error message

More than one maxpool should be specified in SPP block

What it means

Error "More than one maxpool should be specified in SPP block" thrown in tensorflow/models.

Source

Thrown at official/projects/yolo/modeling/layers/nn_blocks.py:1136

  def call(self, inputs, training=None):
    # done this way to prevent confusion in the auto graph
    if self._inverted:
      return self._call_reversed(inputs, training=training)
    else:
      return self._call_regular(inputs, training=training)


class SPP(tf_keras.layers.Layer):
  """Spatial Pyramid Pooling.

  A non-agregated SPP layer that uses Pooling.
  """

  def __init__(self, sizes, **kwargs):
    self._sizes = list(reversed(sizes))
    if not sizes:
      raise ValueError('More than one maxpool should be specified in SPP block')
    super().__init__(**kwargs)

  def build(self, input_shape):
    maxpools = []
    for size in self._sizes:
      maxpools.append(
          tf_keras.layers.MaxPool2D(
              pool_size=(size, size),
              strides=(1, 1),
              padding='same',
              data_format=None))
    self._maxpools = maxpools
    super().build(input_shape)

  def call(self, inputs, training=None):
    outputs = []
    for maxpool in self._maxpools:
      outputs.append(maxpool(inputs))

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/projects/yolo/modeling/layers/nn_blocks.py:1136 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/2a9725a9ebd54ad1. Report an issue: GitHub.