# AUR0905

### **Error message**

Dialog activation rejected

### **Parameters**

None

### Error explanation

This error is thrown as a rejection from the `dialogController.closed` promise when the dialog's activation is prevented by its `canActivate` hook, and the `rejectOnCancel` setting is true for the dialog.

### Common causes

* The `canActivate` hook in the dialog component returned `false` or a promise that resolved to `false`.
* The `rejectOnCancel` setting was set to `true` either globally or in the specific dialog settings.

### How to fix

* **Handle the rejection:** Catch the rejection from the `dialogController.closed` promise (or the `dialogService.open()` promise).
* **Review `canActivate`:** Ensure the `canActivate` logic is correct and only returns `false` when activation should truly be prevented.
* **Review `rejectOnCancel`:** Consider if `rejectOnCancel: true` is the desired behavior. If activation rejection should not be treated as an error, set `rejectOnCancel` to `false` (the default). In this case, the `dialogService.open()` promise will resolve with `{ wasCancelled: true, dialog: dialogController }`.

### Debugging tips

* Check the `canActivate` method of the dialog component.
* Verify the value of the `rejectOnCancel` setting (globally and locally for the dialog).
* Use a `.catch()` block on the promise returned by `dialogService.open()` or `dialogController.closed` to inspect the rejected error.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.aurelia.io/developer-guides/error-messages/0901-to-0908/aur0905.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
