# 990, 991, 992, 993, 994, and 995
source: https://developer.mastercard.com/open-finance-us/documentation/errors/request/unexpected-system-issue/990-991-992-993-994-995/index.md

|           Title           |                                                                                               Details                                                                                                |
|---------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **Error Codes**           | 990, 991, 992, 993, 994, and 995                                                                                                                                                                     |
| **Remediation Category**  | Report or Escalate for Investigation.                                                                                                                                                                |
| **HTTP Status**           | 500                                                                                                                                                                                                  |
| **Data Connect Alert**    | Not applicable.                                                                                                                                                                                      |
| **End User Message**      | Suggested end user message - "We have encountered an error in our internal system."                                                                                                                  |
| **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)