This topic describes the client errors.
| Error message | Error code | Description | HTTP status code |
|---|---|---|---|
| The parameter is missing. | MissingParameter | The input parameter <parameter name> that is mandatory for processing this request is not supplied |
400 |
| The parameter value is invalid. | InvalidParameter | The specified value of parameter <parameter name> is not valid. |
400 |
| The interface is invalid. | UnsupportedOperation | The specified action is not supported. | 400 |
| The version is invalid. | NoSuchVersion | The specified version does not exist. | 400 |
| The operation is rejected by the traffic control system. | Throttling | Request was denied due to request throttling. | 400 |
| The AccessKey is invalid. | InvalidAccessKeyId.NotFound | The AccessKey ID provided does not exist in our records. | 400 |
| The operation is forbidden. | Forbidden | Users are not authorized to operate on the specified resource. | 403 |
| The operation is forbidden by the risk control system. | Forbidden.RiskControl | This operation is forbidden by Aliyun Risk Control system. | 403 |
| The signature is invalid. | SignatureDoesNotMatch | The signature we calculated does not match the one you provided. | 403 |
| Auto Scaling is not activated and thus the API cannot be called. | Forbidden.Unsubscribed | Do not have permission to access this API. | 403 |
| Real-name verification is missing. | Forbidden.UserVerification | Your user account is not verified by Aliyun. | 403 |
| Auto Scaling is not supported by the specified region. | ResourceNotAvailable | Resource you requested is not available in this region or zone. | 400 |