# Failure messages for Amazon S3 export tasks for Amazon RDS
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The following table describes the messages that are returned when Amazon S3 export tasks fail.


| Failure message | Description | 
| --- | --- | 
| An unknown internal error occurred. |  The task has failed because of an unknown error, exception, or failure.  | 
| An unknown internal error occurred writing the export task's metadata to the S3 bucket [bucket name]. |  The task has failed because of an unknown error, exception, or failure.  | 
| The RDS export failed to write the export task's metadata because it can't assume the IAM role [role ARN]. |  The export task assumes your IAM role to validate whether it is allowed to write metadata to your S3 bucket. If the task can't assume your IAM role, it fails.  | 
| The RDS export failed to write the export task's metadata to the S3 bucket [bucket name] using the IAM role [role ARN] with the KMS key [key ID]. Error code: [error code] |  One or more permissions are missing, so the export task can't access the S3 bucket. This failure message is raised when receiving one of the following error codes: [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ExportSnapshot.failure-msg.html) These error codes indicate settings are misconfigured for the IAM role, S3 bucket, or KMS key.  | 
| The IAM role [role ARN] isn't authorized to call [S3 action] on the S3 bucket [bucket name]. Review your permissions and retry the export. |  The IAM policy is misconfigured. Permission for the specific S3 action on the S3 bucket is missing, which causes the export task to fail.  | 
| KMS key check failed. Check the credentials on your KMS key and try again. | The KMS key credential check failed. | 
| S3 credential check failed. Check the permissions on your S3 bucket and IAM policy. | The S3 credential check failed. | 
| The S3 bucket [bucket name] isn't valid. Either it isn't located in the current AWS Region or it doesn't exist. Review your S3 bucket name and retry the export. | The S3 bucket is invalid. | 
| The S3 bucket [bucket name] isn't located in the current AWS Region. Review your S3 bucket name and retry the export. | The S3 bucket is in the wrong AWS Region. |