{"record":{"id":"c25eb04641432e60","repo":"tensorflow/models","slug":"the-mode-is-not-implemented-s-c25eb0","errorCode":null,"errorMessage":"The mode is not implemented: %s","messagePattern":"The mode is not implemented: (.+?)","errorType":"exception","errorClass":"NotImplementedError","httpStatus":null,"severity":"error","filePath":"official/recommendation/ranking/train.py","lineNumber":184,"sourceCode":"    if mode in ['train', 'train_and_eval']:\n      logging.info('Training started')\n      history = model.fit(\n          train_dataset,\n          initial_epoch=initial_epoch,\n          epochs=num_epochs,\n          steps_per_epoch=params.trainer.validation_interval,\n          validation_data=validation_dataset,\n          validation_steps=eval_steps,\n          callbacks=callbacks,\n      )\n      model.summary()\n      logging.info('Train history: %s', history.history)\n    elif mode == 'eval':\n      logging.info('Evaluation started')\n      validation_output = model.evaluate(validation_dataset, steps=eval_steps)\n      logging.info('Evaluation output: %s', validation_output)\n    else:\n      raise NotImplementedError('The mode is not implemented: %s' % mode)\n\n\nif __name__ == '__main__':\n  logging.set_verbosity(logging.INFO)\n  common.define_flags()\n  app.run(main)\n","sourceCodeStart":166,"sourceCodeEnd":191,"githubUrl":"https://github.com/tensorflow/models/blob/e006f5f0d534913e49c1f1dae87364039fa607e2/official/recommendation/ranking/train.py#L166-L191","documentation":"Error \"The mode is not implemented: %s\" thrown in tensorflow/models.","triggerScenarios":"Thrown at official/recommendation/ranking/train.py:184 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"}