--- title: "SQL Server Express LocalDB Error Message Reference | Microsoft Docs" ms.custom: "" ms.date: "03/06/2017" ms.prod: "sql-server-2016" ms.reviewer: "" ms.suite: "" ms.technology: - "docset-sql-devref" ms.tgt_pltfrm: "" ms.topic: "reference" ms.assetid: ee413207-d6f5-4938-82a1-0e245037e246 caps.latest.revision: 8 author: "JennieHubbard" ms.author: "jhubbard" manager: "jhubbard" --- # SQL Server Express LocalDB Reference - Error Messages This section provides reference information about the following SQL Server Express LocalDB error messages: [LOCALDB_ERROR_ADMIN_RIGHTS_REQUIRED](../../relational-databases/express-localdb-error-messages/localdb-error-admin-rights-required.md) Administrator privileges are required in order to execute this operation. [LOCALDB_ERROR_AUTO_INSTANCE_CREATE_FAILED](../../relational-databases/express-localdb-error-messages/localdb-error-auto-instance-create-failed.md) Cannot create an automatic instance. See the Windows Application event log for error details. [LOCALDB_ERROR_CALLER_IS_NOT_OWNER](../../relational-databases/express-localdb-error-messages/localdb-error-caller-is-not-owner.md) API caller is not LocalDB instance owner. [LOCALDB_ERROR_CANNOT_ACCESS_INSTANCE_FOLDER](../../relational-databases/express-localdb-error-messages/localdb-error-cannot-access-instance-folder.md) An instance folder cannot be accessed. [LOCALDB_ERROR_CANNOT_ACCESS_INSTANCE_REGISTRY](../../relational-databases/express-localdb-error-messages/localdb-error-cannot-access-instance-registry.md) An instance registry cannot be accessed. [LOCALDB_ERROR_CANNOT_CREATE_INSTANCE_FOLDER](../../relational-databases/express-localdb-error-messages/localdb-error-cannot-create-instance-folder.md) A folder cannot be created under %userprofile%. [LOCALDB_ERROR_CANNOT_CREATE_SQL_PROCESS](../../relational-databases/express-localdb-error-messages/localdb-error-cannot-create-sql-process.md) A process for SQL Server cannot be created. [LOCALDB_ERROR_CANNOT_GET_USER_PROFILE_FOLDER](../../relational-databases/express-localdb-error-messages/localdb-error-cannot-get-user-profile-folder.md) A user profile folder cannot be retrieved. [LOCALDB_ERROR_CANNOT_MODIFY_INSTANCE_REGISTRY](../../relational-databases/express-localdb-error-messages/localdb-error-cannot-modify-instance-registry.md) An instance registry cannot be modified. [LOCALDB_ERROR_INSTANCE_ALREADY_SHARED](../../relational-databases/express-localdb-error-messages/localdb-error-instance-already-shared.md) The specified instance is already shared. [LOCALDB_ERROR_INSTANCE_BUSY](../../relational-databases/express-localdb-error-messages/localdb-error-instance-busy.md) The specified instance is running. [LOCALDB_ERROR_INSTANCE_CONFIGURATION_CORRUPT](../../relational-databases/express-localdb-error-messages/localdb-error-instance-configuration-corrupt.md) An instance configuration is corrupted. [LOCALDB_ERROR_INSTANCE_EXISTS_WITH_LOWER_VERSION](../../relational-databases/express-localdb-error-messages/localdb-error-instance-exists-with-lower-version.md) The specified instance already exists but its version is lower than requested. [LOCALDB_ERROR_INSTANCE_FOLDER_PATH_TOO_LONG](../../relational-databases/express-localdb-error-messages/localdb-error-instance-folder-path-too-long.md) The path where the instance should be stored is longer than MAX_PATH. [LOCALDB_ERROR_INSTANCE_STOP_FAILED](../../relational-databases/express-localdb-error-messages/localdb-error-instance-stop-failed.md) The stop operation failed to complete within the given time. [LOCALDB_ERROR_INSUFFICIENT_BUFFER](../../relational-databases/express-localdb-error-messages/localdb-error-insufficient-buffer.md) The input buffer is too short, and truncation was not requested. [LOCALDB_ERROR_INTERNAL_ERROR](../../relational-databases/express-localdb-error-messages/localdb-error-internal-error.md) An unexpected error occurred. See the event log for details. [LOCALDB_ERROR_INVALID_INSTANCE_NAME](../../relational-databases/express-localdb-error-messages/localdb-error-invalid-instance-name.md) The specified instance name is invalid. [LOCALDB_ERROR_INVALID_PARAMETER](../../relational-databases/express-localdb-error-messages/localdb-error-invalid-parameter.md) One or more specified input parameters are invalid. [LOCALDB_ERROR_NOT_INSTALLED](../../relational-databases/express-localdb-error-messages/localdb-error-not-installed.md) SQL Server Express LocalDB is not installed on the computer. [LOCALDB_ERROR_SHARED_NAME_TAKEN](../../relational-databases/express-localdb-error-messages/localdb-error-shared-name-taken.md) The specified shared name is already taken. [LOCALDB_ERROR_SQL_SERVER_STARTUP_FAILED](../../relational-databases/express-localdb-error-messages/localdb-error-sql-server-startup-failed.md) A SQL Server process was started, but SQL Server startup failed. [LOCALDB_ERROR_TOO_MANY_SHARED_INSTANCES](../../relational-databases/express-localdb-error-messages/localdb-error-too-many-shared-instances.md) There are too many shared instances. [LOCALDB_ERROR_UNKNOWN_ERROR_CODE](../../relational-databases/express-localdb-error-messages/localdb-error-unknown-error-code.md) The requested message does not exist. [LOCALDB_ERROR_UNKNOWN_INSTANCE](../../relational-databases/express-localdb-error-messages/localdb-error-unknown-instance.md) The instance does not exist. [LOCALDB_ERROR_UNKNOWN_LANGUAGE_ID](../../relational-databases/express-localdb-error-messages/localdb-error-unknown-language-id.md) The message is not available in the requested language. [LOCALDB_ERROR_UNKNOWN_VERSION](../../relational-databases/express-localdb-error-messages/localdb-error-unknown-version.md) The specified version is not available. [LOCALDB_ERROR_VERSION_REQUESTED_NOT_INSTALLED](../../relational-databases/express-localdb-error-messages/localdb-error-version-requested-not-installed.md) The specified patch level is not installed. [LOCALDB_ERROR_WAIT_TIMEOUT](../../relational-databases/express-localdb-error-messages/localdb-error-wait-timeout.md) A time-out occurred while trying to acquire the synchronization locks. [LOCALDB_ERROR_XEVENT_FAILED](../../relational-databases/express-localdb-error-messages/localdb-error-xevent-failed.md) Failed to start XEvent engine within the LocalDB Instance API.