# Most Common Error Codes source: https://developer.mastercard.com/open-finance-us/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-us/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-us/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-us/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-us/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-us/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. | | [38007](https://developer.mastercard.com/open-finance-us/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. | | [38006](https://developer.mastercard.com/open-finance-us/documentation/errors/accounterrors/account-not-found/909-913-914-946-952/index.md#38006) | Verify Account or Data State | 404 or 500 | Customer does not have any accounts associated with `institutionId`. | | [947](https://developer.mastercard.com/open-finance-us/documentation/errors/accounterrors/invalidtoken/947-2024/index.md#947) | Data Connect Fix | 500 | Your token is invalid or has expired. Please re-authenticate.​ | | [185](https://developer.mastercard.com/open-finance-us/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. | | [44000](https://developer.mastercard.com/open-finance-us/documentation/errors/request/max-limit-exceeded/index.md#44000) | Retry Later | 202 | This error indicates that you have reached your maximum API usage plan limit. The number of requests you have made has exceeded the threshold set for your current usage plan.​ | ## User Error Codes {#user-error-codes} | Error Code | Remediation Category | HTTP Status | Error Message | |--------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------|-------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [103](https://developer.mastercard.com/open-finance-us/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. | | [973](https://developer.mastercard.com/open-finance-us/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. | | [170](https://developer.mastercard.com/open-finance-us/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. | | [38008](https://developer.mastercard.com/open-finance-us/documentation/errors/request/item-not-found/index.md#38008) | Invalid Input | 404 | Account details not found. | | [102](https://developer.mastercard.com/open-finance-us/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. | | [960](https://developer.mastercard.com/open-finance-us/documentation/errors/institutionerrors/connection-not-supported/index.md#960) | Verify Account or Data State | 500 | Electronic Statement is not available for the requested account. | | [982](https://developer.mastercard.com/open-finance-us/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 ticket](https://developer.mastercard.com/open-finance-us/documentation/support/index.md#create-a-support-case-in-scm) is the recommended action. | | [187](https://developer.mastercard.com/open-finance-us/documentation/errors/accounterrors/incompleteauth/938-940-971-185-187/index.md#187) | Re-Authenticate or Provide Additional Information | 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-us/documentation/errors/request/invalidrequest/index.md#978) | Invalid Input | 500 | The requested resource is not applicable/supported for this product. | | [38057](https://developer.mastercard.com/open-finance-us/documentation/errors/request/item-not-found/index.md#38057) | Verify Account or Data State | 500 | Money Transfer details not found. |