# Data transformations

> It can occur that the Preview does not change after you changed the query and run the file.

## Preview does not change after changing the query

It can occur that the Preview does not change after you changed the query and run the file.

### Possible cause

The `sql` file is identical to the one in `dbt`, as it has not been updated since the last run. If you run the file again, no changes will be detected and therefore the Preview table won't be updated. For example, if you add a `WHERE` condition and run the file, the Preview will only show the filtered records. However, if you remove this `WHERE` condition and run the file again, the Preview will still only display the previously filtered records, when it should actually show all records.

### Solution

Add, or change, a comment in the `SQL` file. This will force a `dbt` run and the Preview will be updated.

## Message: The selection criterion does not match any nodes. Nothing to do.

The following warning messages are displayed in the data run log.

![docs image](https://dev-assets.cms.uipath.com/assets/images/process-mining/process-mining-docs-image-358007-4aedff96-c21cb4a0.webp)

When you get the two warning messages `The selection criterion "+<file>.state:modified+" does not match any nodes` and `Nothing to do. Try checking your model configs and model specifications args`, it means that no changes were detected compared to the last time the queries were run. The **Preview** panels are showing the most up-to-date version of the data.

To force a complete re-run of your queries, select **Apply to dashboards**.