{"record":{"id":"f2b84e88c7a4e23b","repo":"tensorflow/models","slug":"stem-type-stem-type-not-supported-f2b84e","errorCode":null,"errorMessage":"Stem type {stem_type} not supported.","messagePattern":"Stem type (.+?) not supported\\.","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"official/vision/modeling/backbones/resnet_3d.py","lineNumber":284,"sourceCode":"      x = tf_utils.get_activation(self._activation)(x)\n      x = layers.Conv3D(\n          filters=64,\n          kernel_size=[1, 3, 3],\n          strides=[1, 1, 1],\n          use_bias=False,\n          padding='same',\n          kernel_initializer=self._kernel_initializer,\n          kernel_regularizer=self._kernel_regularizer,\n          bias_regularizer=self._bias_regularizer)(\n              x)\n      x = self._norm(\n          axis=self._bn_axis,\n          momentum=self._norm_momentum,\n          epsilon=self._norm_epsilon,\n          synchronized=self._use_sync_bn)(x)\n      x = tf_utils.get_activation(self._activation)(x)\n    else:\n      raise ValueError(f'Stem type {stem_type} not supported.')\n\n    return x\n\n  def _block_group(self,\n                   inputs: tf.Tensor,\n                   filters: int,\n                   temporal_kernel_sizes: Tuple[int],\n                   temporal_strides: int,\n                   spatial_strides: int,\n                   block_fn: Callable[\n                       ...,\n                       tf_keras.layers.Layer] = nn_blocks_3d.BottleneckBlock3D,\n                   block_repeats: int = 1,\n                   stochastic_depth_drop_rate: float = 0.0,\n                   use_self_gating: bool = False,\n                   name: str = 'block_group'):\n    \"\"\"Creates one group of blocks for the ResNet3D model.\n","sourceCodeStart":266,"sourceCodeEnd":302,"githubUrl":"https://github.com/tensorflow/models/blob/e006f5f0d534913e49c1f1dae87364039fa607e2/official/vision/modeling/backbones/resnet_3d.py#L266-L302","documentation":"Error \"Stem type {stem_type} not supported.\" thrown in tensorflow/models.","triggerScenarios":"Thrown at official/vision/modeling/backbones/resnet_3d.py:284 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Use stem_type 'v0' or 'v1' in the ResNet3D backbone config.","Remove stem_type to use the default stem."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"e006f5f0d534913e49c1f1dae87364039fa607e2","analyzedAt":"2026-08-24T14:09:15.576Z","schemaVersion":2},"datasetVersion":"2026-08-24T17:17:21.512Z"}