tensorflow/models · error · ValueError

Backbone model `{}` is not supported.

Error message

Backbone model `{}` is not supported.

What it means

Error "Backbone model `{}` is not supported." thrown in tensorflow/models.

Source

Thrown at official/legacy/detection/modeling/architecture/factory.py:50

      epsilon=params.batch_norm_epsilon,
      trainable=params.batch_norm_trainable,
      activation=params.activation)


def backbone_generator(params):
  """Generator function for various backbone models."""
  if params.architecture.backbone == 'resnet':
    resnet_params = params.resnet
    backbone_fn = resnet.Resnet(
        resnet_depth=resnet_params.resnet_depth,
        activation=params.norm_activation.activation,
        norm_activation=norm_activation_generator(
            params.norm_activation))
  elif params.architecture.backbone == 'spinenet':
    spinenet_params = params.spinenet
    backbone_fn = spinenet.SpineNetBuilder(model_id=spinenet_params.model_id)
  else:
    raise ValueError('Backbone model `{}` is not supported.'
                     .format(params.architecture.backbone))

  return backbone_fn


def multilevel_features_generator(params):
  """Generator function for various FPN models."""
  if params.architecture.multilevel_features == 'fpn':
    fpn_params = params.fpn
    fpn_fn = fpn.Fpn(
        min_level=params.architecture.min_level,
        max_level=params.architecture.max_level,
        fpn_feat_dims=fpn_params.fpn_feat_dims,
        use_separable_conv=fpn_params.use_separable_conv,
        activation=params.norm_activation.activation,
        use_batch_norm=fpn_params.use_batch_norm,
        norm_activation=norm_activation_generator(
            params.norm_activation))

View on GitHub (pinned to e006f5f0d5)

When it happens

Trigger: Thrown at official/legacy/detection/modeling/architecture/factory.py:50 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/0b140cc501bca78c. Report an issue: GitHub.