API Reference > core-bentley > Errors Errors Classes for working with errors. Classes Name Description BentleyError Base exception class for iTwin.js exceptions. UnexpectedErrors Utility for handling/reporting unexpected runtime errors. Enumerations Name Description AuthStatus Authentication Errors Beta BentleyStatus Standard status code. BriefcaseStatus Error status from various briefcase operations Beta ChangeSetStatus Error status from various Changeset operations Beta GeoServiceStatus GeoServiceStatus errors HttpStatus Status from returned HTTP status code Beta IModelHubStatus iModelHub Services Errors Beta IModelStatus Status codes that are used in conjunction with BentleyError. RepositoryStatus Return codes for methods which perform repository management operations Beta RpcInterfaceStatus RpcInterface status codes Beta Interfaces Name Description StatusCodeWithMessage When you want to associate an explanatory message with an error status value. Beta Type Aliases Name Description GetMetaDataFunction LoggingMetaData Optional metadata attached to a BentleyError. OnUnexpectedError Last Updated: 20 May, 2022