# Error Handling
source: https://developer.mastercard.com/open-finance-us/documentation/errors/index.md

To help you with effective error handling, the errors have been classified into categories based on when they occur during the use of Mastercard's Open Finance solutions.

[Error Lists](https://developer.mastercard.com/open-finance-us/documentation/errors/index.md#error-lists)  

[Data Connect Alerts](https://developer.mastercard.com/open-finance-us/documentation/errors/index.md#data-connect-alerts)

## Error Lists {#error-lists}

### Full Error List {#full-error-list}

A comprehensive list of error codes in numerical order.

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

### Error Remediation Categories {#error-remediation-categories}

Description of the different types of errors and how to handle them generally.

[View Remediation Categories](https://developer.mastercard.com/open-finance-us/documentation/errors/error-remediation-categories/index.md)

### Most Common Errors {#most-common-errors}

A list of the most common aggregation and user errors.

[View Most Common Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/most-common/index.md)

### Mastercard Data Connect Errors {#mastercard-data-connect-errors}

A summary of the errors that can occur during the user journey through the Data Connect experience.

[View Mastercard Data Connect Errors](https://developer.mastercard.com/open-finance-us/documentation/connect/connect-errors/index.md)

### Account Errors {#account-errors}

Errors that occur during the end-user account selection, account permissioning and account authentication journey.

[View Account Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/error-list/index.md)

### Institution Errors {#institution-errors}

Errors that occur when connecting to Financial Institutions.

[View Institution Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/institution-errors/index.md)

### Request Errors {#request-errors}

Errors generated for API requests across all endpoints under Mastercard Open Finance services.

[View Request Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/request-errors/index.md)

## Data Connect Alerts {#data-connect-alerts}

When a customer encounters an error while in the Data Connect flow, Data Connect displays an error message and code in the app. The Data Connect Alert messages are listed in the descriptions of the applicable error codes in this documentation. The following image is typical of how an alert looks to a customer. The title, error message, and error code change according to the error.

![103](https://static.developer.mastercard.com/content/open-finance-us/uploads/103-1.png)