> For the complete documentation index, see [llms.txt](https://developer.paddle.com/llms.txt).

# Invalid simulation configuration

The simulation configuration is invalid.

---

## Example

```json
{
  "error": {
    "type": "request_error",
    "code": "notification_simulation_run_configuration_conflict",
    "detail": "Simulations with invalid configuration can't be run.",
    "documentation_url": "https://developer.paddle.com/errors/notifications/notification_simulation_run_configuration_conflict"
  },
  "meta": {
    "request_id": "00000000-0000-0000-0000-000000000000"
  }
}
```

## Details

| Attribute | Value |
| --- | --- |
| Status code | 409 |
| Error code | `notification_simulation_run_configuration_conflict` |
| Error message | Simulations with invalid configuration can't be run. |

## Common causes

- The simulation scenario is configured incorrectly.

## Common solutions

- Check the `config` object against the simulation you're trying to run.
- Make sure that values for `entities` exist for the Paddle account you're working with. For example, if you included `config.subscription_cancellation.entities.subscription_id`, it must be valid.
- Make sure that the values passed for `options` are correct.