{"record":{"id":"d1bce86f5daa68d6","repo":"tensorflow/models","slug":"init-checkpoint-modules-backbone-is-no-longer-supp","errorCode":null,"errorMessage":"init_checkpoint_modules=backbone is no longer supported. Specify backbone checkpoints in each backbone config.","messagePattern":"init_checkpoint_modules=backbone is no longer supported\\. Specify backbone checkpoints in each backbone config\\.","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"official/projects/pix2seq/tasks/pix2seq_task.py","lineNumber":100,"sourceCode":"        drop_units=config.drop_units,\n        drop_att=config.drop_att,\n        num_heads=config.num_heads,\n        temperature=config.temperature,\n        top_p=config.top_p,\n        top_k=config.top_k,\n        early_stopping_token=config.early_stopping_token,\n    )\n    return model\n\n  def _get_ckpt(self, ckpt_dir_or_file: str) -> str:\n    if tf.io.gfile.isdir(ckpt_dir_or_file):\n      return tf.train.latest_checkpoint(ckpt_dir_or_file)\n    return ckpt_dir_or_file\n\n  def initialize(self, model: tf_keras.Model):\n    \"\"\"Loading pretrained checkpoint.\"\"\"\n    if self._task_config.init_checkpoint_modules == 'backbone':\n      raise ValueError(\n          'init_checkpoint_modules=backbone is no longer supported. Specify'\n          ' backbone checkpoints in each backbone config.'\n      )\n\n    if self._task_config.init_checkpoint_modules not in ['all', 'partial', '']:\n      raise ValueError(\n          'Unsupported init_checkpoint_modules: '\n          f'{self._task_config.init_checkpoint_modules}'\n      )\n\n    if self._task_config.init_checkpoint and any(\n        [b.init_checkpoint for b in self._task_config.model.backbones]\n    ):\n      raise ValueError(\n          'A global init_checkpoint and a backbone init_checkpoint cannot be'\n          ' specified at the same time.'\n      )\n","sourceCodeStart":82,"sourceCodeEnd":118,"githubUrl":"https://github.com/tensorflow/models/blob/e006f5f0d534913e49c1f1dae87364039fa607e2/official/projects/pix2seq/tasks/pix2seq_task.py#L82-L118","documentation":"Error \"init_checkpoint_modules=backbone is no longer supported. Specify backbone checkpoints in each backbone config.\" thrown in tensorflow/models.","triggerScenarios":"Thrown at official/projects/pix2seq/tasks/pix2seq_task.py:100 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"}