# PTDJAXError { #phasic.exceptions.PTDJAXError }

```python
phasic.exceptions.PTDJAXError()
```

JAX-specific error.

Raised when JAX is required but not installed or when JAX operations fail.

## Examples {.doc-section .doc-section-examples}

```python
>>> import phasic as ptd
>>> ptd.configure(jax=True)  # JAX not installed
PTDJAXError: jax=True but JAX not installed.
  Install: pip install jax jaxlib
  Or: phasic.configure(jax=False)
```