{"record":{"id":"c6a9cbe496bc8581","repo":"tensorflow/models","slug":"stem-type-not-supported-c6a9cb","errorCode":null,"errorMessage":"Stem type {} not supported.","messagePattern":"Stem type (.+?) not supported\\.","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"official/vision/modeling/backbones/resnet_unet.py","lineNumber":367,"sourceCode":"      x = layers.Conv2D(\n          filters=int(64 * stem_depth_multiplier),\n          kernel_size=3,\n          strides=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=bn_axis,\n          momentum=norm_momentum,\n          epsilon=norm_epsilon,\n          trainable=bn_trainable)(\n              x)\n      x = tf_utils.get_activation(activation, use_keras_layer=True)(x)\n    else:\n      raise ValueError('Stem type {} not supported.'.format(stem_type))\n\n    if replace_stem_max_pool:\n      x = layers.Conv2D(\n          filters=int(64 * self._depth_multiplier),\n          kernel_size=3,\n          strides=2,\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=bn_axis,\n          momentum=norm_momentum,\n          epsilon=norm_epsilon,\n          trainable=bn_trainable)(\n              x)","sourceCodeStart":349,"sourceCodeEnd":385,"githubUrl":"https://github.com/tensorflow/models/blob/e006f5f0d534913e49c1f1dae87364039fa607e2/official/vision/modeling/backbones/resnet_unet.py#L349-L385","documentation":"Error \"Stem type {} not supported.\" thrown in tensorflow/models.","triggerScenarios":"Thrown at official/vision/modeling/backbones/resnet_unet.py:367 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Use stem_type 'v0' or 'v1' in the ResNet-UNet 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"}