{"record":{"id":"4e6d5752f3d0b964","repo":"tensorflow/models","slug":"start-n-top-must-be-greater-than-1","errorCode":null,"errorMessage":"`start_n_top` must be greater than 1.","messagePattern":"`start_n_top` must be greater than 1\\.","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"official/nlp/modeling/networks/span_labeling.py","lineNumber":156,"sourceCode":"  def __init__(self,\n               input_width,\n               start_n_top=5,\n               end_n_top=5,\n               activation='tanh',\n               dropout_rate=0.,\n               initializer='glorot_uniform',\n               **kwargs):\n    super().__init__(**kwargs)\n    self._config = {\n        'input_width': input_width,\n        'activation': activation,\n        'initializer': initializer,\n        'start_n_top': start_n_top,\n        'end_n_top': end_n_top,\n        'dropout_rate': dropout_rate,\n    }\n    if start_n_top <= 1:\n      raise ValueError('`start_n_top` must be greater than 1.')\n    self._start_n_top = start_n_top\n    self._end_n_top = end_n_top\n    self.start_logits_dense = tf_keras.layers.Dense(\n        units=1,\n        kernel_initializer=tf_utils.clone_initializer(initializer),\n        name='predictions/transform/start_logits')\n\n    self.end_logits_inner_dense = tf_keras.layers.Dense(\n        units=input_width,\n        kernel_initializer=tf_utils.clone_initializer(initializer),\n        activation=activation,\n        name='predictions/transform/end_logits/inner')\n    self.end_logits_layer_norm = tf_keras.layers.LayerNormalization(\n        axis=-1, epsilon=1e-12,\n        name='predictions/transform/end_logits/layernorm')\n    self.end_logits_output_dense = tf_keras.layers.Dense(\n        units=1,\n        kernel_initializer=tf_utils.clone_initializer(initializer),","sourceCodeStart":138,"sourceCodeEnd":174,"githubUrl":"https://github.com/tensorflow/models/blob/e006f5f0d534913e49c1f1dae87364039fa607e2/official/nlp/modeling/networks/span_labeling.py#L138-L174","documentation":"Error \"`start_n_top` must be greater than 1.\" thrown in tensorflow/models.","triggerScenarios":"Thrown at official/nlp/modeling/networks/span_labeling.py:156 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"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"}