# Most Common Error Codes source: https://developer.mastercard.com/open-finance-au/documentation/errors/most-common/index.md This section lists the most common system errors and user errors that you are likely to encounter through your integration with Mastercard Data Connect. The tables list the errors, ranked in order of occurrence, along with the associated error message. Click the error code for more information about the error and how to address it. ## Aggregation Error Codes {#aggregation-error-codes} | Error Code | Remediation Category | HTTP Status | Error Message | |---------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------|-------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [14001](https://developer.mastercard.com/open-finance-au/documentation/errors/request/item-not-found/index.md#14001) | Verify Account or Data State | 404 | Customer not found. | | [103](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/invalidcredentials/index.md#103) | Data Connect Fix | 500 | Invalid login credentials. Prompt the user for a new password or have them reset it. | | [325](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/325/index.md) | Retry Later | 500 | The account is currently being aggregated. Call the [Get Customer Account](https://developer.mastercard.com/open-finance-au/documentation/api-reference/index.md#GetCustomerAccounts) endpoint periodically to view the account status. The refresh operation is complete when `aggregationStatusCode` is 0 and `aggregationSuccessDate` is greater than or equal to `aggregationAttemptDate`. | | [38003](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/account-not-found/909-913-914-946-952/index.md#38003) | Verify Account or Data State | 404 or 500 | Customer doesn't have given account. | | [185](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/incompleteauth/938-940-971-185-187/index.md#185) | Data Connect Fix | 500 | Missing or incorrect MFA answer. One of your security questions (for example, name of your first pet) has expired and needs to be answered. | | [978](https://developer.mastercard.com/open-finance-au/documentation/errors/request/invalidrequest/index.md#978) | Invalid Input | 500 | An error occurred in the financial institution connection. Submitting a support ticket is the recommended action. | | [947](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/invalidtoken/947-2024/index.md#947) | Data Connect Fix | 500 | Your token is invalid or has expired. Please re-authenticate.​ | | [38007](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/incompleteauth/938-940-971-185-187/index.md#38007) | Verify Account or Data State | 500 | Missing or incorrect MFA answer. One of your security questions (for example, name of your first pet) has expired and needs to be answered. | | [973](https://developer.mastercard.com/open-finance-au/documentation/errors/institutionerrors/connection-not-supported/index.md#973) | Re-Authenticate or Provide Additional Information | 500 | The user is not authorized for the requested resource or online access. | ## User Error Codes {#user-error-codes} | Error Code | Remediation Category | HTTP Status | Error Message | |--------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------|-------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [103](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/invalidcredentials/index.md#103) | Data Connect Fix | 500 | Invalid login credentials. Prompt the user for a new password or have them reset it. | | [2003](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/consentauth/consentauthorization/index.md#2003) | Re-Authenticate or Provide additional Information | 401 | Consent was not provided. ​ | | [187](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/incompleteauth/938-940-971-185-187/index.md#187) | Re-Authenticate or Provide Additional Information | 500 | Missing or incorrect MFA answer. Customer has answered their MFA question incorrectly. Call Refresh Customer Account. | | [11000](https://developer.mastercard.com/open-finance-au/documentation/errors/institutionerrors/other-connection-issues/index.md#11000) | Report or Escalate for Investigation | 500 | Something unexpected happened on the server. We have logged the error and are investigating. | | [170](https://developer.mastercard.com/open-finance-au/documentation/errors/institutionerrors/other-connection-issues/index.md#unknown-technical-errors) | Retry Later | 500 | An error occurred in the financial institution connection. Submitting a support ticketopens in a new tab is the recommended action. | | [331](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/expiredsession/expiredsession/index.md#331) | Re-Authenticate or Provide Additional Information | 400 | The customer has taken too long to answer an MFA question. This error typically will not appear as we will prompt them to try again before the time runs out. The customer has 5 minutes to answer an MFA question. | | [102](https://developer.mastercard.com/open-finance-au/documentation/errors/institutionerrors/connection-interrupt/existing-connection-interruptions/index.md#102) | Retry Later | 500 | Invalid login credentials. Prompt the user for a new password or have them reset it. | | [1415](https://developer.mastercard.com/open-finance-au/documentation/errors/institutionerrors/connection-not-supported/index.md#1415) | Invalid Input | 500 | An error occurred in the financial institution connection. Submitting a [support ticket](https://developer.mastercard.com/open-finance-au/documentation/support/index.md#create-a-support-case-in-scm) is the recommended action.​ | | [2006](https://developer.mastercard.com/open-finance-au/documentation/errors/accounterrors/consentauth/consentauthorization/index.md#2006) | Retry Later | 500 | An error occurred in the financial institution​ connection. | | [14006](https://developer.mastercard.com/open-finance-au/documentation/errors/request/item-not-found/index.md#14006) | Report or Escalate for Investigation | 404 | Institution not found. |