# tinker_cookbook.exceptions.ConfigurationError

## *class* [**tinker_cookbook.exceptions.ConfigurationError**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/exceptions.py#L69)(*[TinkerCookbookError](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/exceptions/tinkercookbookerror/index.md), ValueError*)

A configuration parameter is invalid or missing.

Raised when user-supplied configuration (model names, hyperparameters, renderer names, required fields, etc.) fails validation. Inherits from `ValueError` for backward compatibility with code that already catches `ValueError` for configuration problems.