# `SnakeBridge.RefNotFoundError`
[🔗](https://github.com/nshkrdotcom/snakebridge/blob/v0.16.0/lib/snakebridge/ref_not_found_error.ex#L1)

Raised when a Python object reference cannot be found in the registry.

This typically occurs when:
- The ref was already released via `release_ref/1`
- The session was released via `release_session/1`
- The ref expired due to TTL
- The ref was evicted due to registry size limits

## Fields

- `:ref_id` - The ref ID that was not found
- `:session_id` - The session ID the ref was looked up in
- `:message` - Human-readable error message

# `t`

```elixir
@type t() :: %SnakeBridge.RefNotFoundError{
  __exception__: true,
  message: String.t(),
  ref_id: String.t() | nil,
  session_id: String.t() | nil
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*