> ## Documentation Index
> Fetch the complete documentation index at: https://docs.crossmint.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CrossmintTokensException

> Flutter Final Class

**Final Class**

Thrown by token-related operations — balance lookup failures, missing token metadata.

```dart theme={null}
final class CrossmintTokensException extends CrossmintException
```

## Constructors

### CrossmintTokensException

```dart theme={null}
const CrossmintTokensException(
  super.message, {
  super.code = CrossmintErrorCode.unknown,
  super.cause,
})
```

Creates a tokens exception.