# traceOpen

`import { traceOpen } from "destack:runtime";`

Open one causal trace cursor.

```ds title="traceOpen"
export declare function traceOpen(world: WorldHandle, options?: TraceCursorOptions | undefined): Result<TraceCursorHandle, HostError>
```

[language/library/src/runtime/trace.ds:75:78](https://github.com/destack-sh/destack/blob/main/language/library/src/runtime/trace.ds#L75-L78)