# 996, 997 and 998
source: https://developer.mastercard.com/open-finance-us/documentation/errors/request/unexpected-system-issue/996-997-998/index.md

|           Title           |                                                                                                           Details                                                                                                           |
|---------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **Error Codes**           | 996, 997 and 998                                                                                                                                                                                                            |
| **Remediation Category**  | Report or Escalate for Investigation.                                                                                                                                                                                       |
| **HTTP Status**           | 500                                                                                                                                                                                                                         |
| **Data Connect Alert**    | Not applicable.                                                                                                                                                                                                             |
| **End User Message**      | Suggest displaying the following error messages to your end users: * 996 - Implementation for this request is not available as of now. * 997 - We have encountered an error in our internal system. * 998 - Invalid Request |
| **Error Message**         | We have encountered an error in our internal system. Please submit a [support ticket](https://developer.mastercard.com/open-finance-us/documentation/support/index.md#create-a-support-case-in-scm).                        |
| **Common Causes**         | Due to an unexpected system issue, data request cannot be completed.​                                                                                                                                                       |
| **Troubleshooting Steps** | Submit a [support ticket](https://developer.mastercard.com/open-finance-us/documentation/support/index.md#create-a-support-case-in-scm) for troubleshooting.                                                                |
| **Retriable by End User** | No.​                                                                                                                                                                                                                        |

[Full Error List](https://developer.mastercard.com/open-finance-us/documentation/errors/error-list/index.md) \| [Request Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/request-errors/index.md)