# tinker_cookbook.exceptions

| Class                                                                                                                                         | Description                                                   |
| --------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------- |
| [`TinkerCookbookError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/tinkercookbookerror/index.md)               | Base exception for all tinker-cookbook errors.                |
| [`ConfigurationError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/configurationerror/index.md)                 | A configuration parameter is invalid or missing.              |
| [`DataError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/dataerror/index.md)                                   | An error related to training or evaluation data.              |
| [`DataFormatError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/dataformaterror/index.md)                       | Data is not in the expected format.                           |
| [`DataValidationError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/datavalidationerror/index.md)               | Data fails a semantic validation check.                       |
| [`RendererError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/renderererror/index.md)                           | An error related to renderer configuration or rendering.      |
| [`TrainingError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/trainingerror/index.md)                           | An error during a training loop.                              |
| [`CheckpointError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/checkpointerror/index.md)                       | An error related to saving, loading, or resuming checkpoints. |
| [`AllTrajectoriesFailedError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/alltrajectoriesfailederror/index.md) | All trajectories in a rollout group failed.                   |
| [`WeightsError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/weightserror/index.md)                             | An error related to weight download, merge, or export.        |
| [`WeightsDownloadError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/weightsdownloaderror/index.md)             | Failed to download weights from Tinker storage.               |
| [`WeightsMergeError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/weightsmergeerror/index.md)                   | Failed to merge LoRA adapter weights into a base model.       |
| [`WeightsAdapterError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/weightsadaptererror/index.md)               | Failed to convert a Tinker LoRA adapter to PEFT format.       |
| [`SandboxError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/sandboxerror/index.md)                             | An error related to code-execution sandboxes.                 |
| [`EvalError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/evalerror/index.md)                                   | An error during benchmark evaluation.                         |
| [`EvalTimeoutError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/evaltimeouterror/index.md)                     | A single evaluation example exceeded its time limit.          |
| [`EvalGradingError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/evalgradingerror/index.md)                     | The grading function failed on a model response.              |
| [`BenchmarkNotFoundError`](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/benchmarknotfounderror/index.md)         | The requested benchmark is not in the registry.               |