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

# Rows not attached to a dataset or experiment

export const plans_0 = "Plans: Any"

export const deployments_0 = "Deployments: Any"

export const data_plane_version_0 = undefined

export const use_case_0 = "Use case - Running EvalAsync with a parent context exported from braintrust.init() when dataset linkage needs to be recorded on the experiment"

<Note>
  **Applies to:**

  * Plan - {plans_0}
  * Deployment - {deployments_0}
  * {data_plane_version_0}
  * {use_case_0}
</Note>

## Summary

**Issue:** When using `EvalAsync` with a `parent` context, the experiment sidebar shows "Rows not attached to a dataset" and the dataset activity tab shows "No experiment that used this dataset was found."

**Cause:** Passing `parent=parent_ctx` to `EvalAsync` prevents it from creating a new experiment, so dataset linkage is never recorded and the experiment created by `braintrust.init()` has no `dataset` parameter set.

**Resolution:** Pass `dataset=dataset` to `braintrust.init()` to register the dataset ID and version on the experiment.

***

## Resolution Steps

### If you are using `EvalAsync` with a `parent` context, pass `dataset` to `braintrust.init()`

Add `dataset=dataset` to your `init()` call. This records the dataset ID and current version on the experiment before `EvalAsync` runs.

```python theme={"theme":{"light":"github-light","dark":"github-dark-dimmed"}}
dataset = braintrust.init_dataset(
    project_id=self.project_id,
    name=self.config.dataset.name,
)

experiment = braintrust.init(
    project_id=self.project_id,
    experiment=self.config.experiment.name,
    metadata=experiment_metadata,
    dataset=dataset,  # Required to link dataset to this experiment
)

parent_ctx = experiment.export() if experiment else None
await braintrust.EvalAsync(
    ...,
    data=dataset,
    parent=parent_ctx,
)
```

After this change:

* The experiment sidebar shows the linked dataset name and version.
* The dataset activity tab lists experiments that used the dataset.

### If you need to pin to a specific dataset version

Pass `version` to `init_dataset()`

```python theme={"theme":{"light":"github-light","dark":"github-dark-dimmed"}}
dataset = braintrust.init_dataset(
    project_id=self.project_id,
    name=self.config.dataset.name,
    version="<version_string>",
)
```

The version string is visible on the Datasets page. Experiments automatically pin to the dataset version at run time when `dataset` is passed to `init()`.