UPDATE_ROLLBACK_COMPLETE

Question

Hello.
I'm trying to update my stack on cloud formation to add custom vocabulary for AWS transcribe.
every time I update the stack it rollback changes and the status changed to UPDATE_ROLLBACK_COMPLETE
how can I know the reason of rolling back? I need to apply my change Can anyone tell me what should I do?
regards,

Dmitry Balabanov · Answer

Consider the [Troubleshooting CloudFormation](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/troubleshooting.html) guide.

Use the CloudFormation console to view the status of your stack. In the console, you can view a list of stack events while your stack is being updated. From this list, find the failure event and then view the status reason for that event. The status reason might contain an error message from AWS CloudFormation or from a particular service that can help you troubleshoot your problem. For more information about viewing stack events, see [Viewing AWS CloudFormation stack data and resources](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cfn-console-view-stack-data-resources.html).

You can also use the AWS CLI to describe your stack's events and search for the failures in the list:

```shell
aws cloudformation describe-stack-events --stack-name myStackName
```

UPDATE_ROLLBACK_COMPLETE

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