| title | LocalDB Error Message Reference |
|---|---|
| titleSuffix | SQL Server Express |
| description | This section provides reference information about the following SQL Server Express LocalDB error messages. |
| author | WilliamDAssafMSFT |
| ms.author | wiassaf |
| ms.reviewer | randolphwest |
| ms.date | 07/14/2025 |
| ms.service | sql |
| ms.subservice | performance |
| ms.topic | reference |
[!INCLUDE SQL Server]
This section provides reference information about the following SQL Server Express LocalDB error messages:
| Error message | Description |
|---|---|
| LOCALDB_ERROR_ADMIN_RIGHTS_REQUIRED | Administrator privileges are required in order to execute this operation. |
| LOCALDB_ERROR_AUTO_INSTANCE_CREATE_FAILED | Can't create an automatic instance. See the Windows Application event log for error details. |
| LOCALDB_ERROR_CALLER_IS_NOT_OWNER | API caller isn't LocalDB instance owner. |
| LOCALDB_ERROR_CANNOT_ACCESS_INSTANCE_FOLDER | An instance folder can't be accessed. |
| LOCALDB_ERROR_CANNOT_ACCESS_INSTANCE_REGISTRY | An instance registry can't be accessed. |
| LOCALDB_ERROR_CANNOT_CREATE_INSTANCE_FOLDER | A folder can't be created under %userprofile%. |
| LOCALDB_ERROR_CANNOT_CREATE_SQL_PROCESS | A process for SQL Server can't be created. |
| LOCALDB_ERROR_CANNOT_GET_USER_PROFILE_FOLDER | A user profile folder can't be retrieved. |
| LOCALDB_ERROR_CANNOT_MODIFY_INSTANCE_REGISTRY | An instance registry can't be modified. |
| LOCALDB_ERROR_INSTANCE_ALREADY_SHARED | The specified instance is already shared. |
| LOCALDB_ERROR_INSTANCE_BUSY | The specified instance is running. |
| LOCALDB_ERROR_INSTANCE_CONFIGURATION_CORRUPT | An instance configuration is corrupted. |
| LOCALDB_ERROR_INSTANCE_EXISTS_WITH_LOWER_VERSION | The specified instance already exists but its version is lower than requested. |
| LOCALDB_ERROR_INSTANCE_FOLDER_PATH_TOO_LONG | The path where the instance should be stored is longer than MAX_PATH. |
| LOCALDB_ERROR_INSTANCE_STOP_FAILED | The stop operation failed to complete within the given time. |
| LOCALDB_ERROR_INSUFFICIENT_BUFFER | The input buffer is too short, and truncation wasn't requested. |
| LOCALDB_ERROR_INTERNAL_ERROR | An unexpected error occurred. See the event log for details. |
| LOCALDB_ERROR_INVALID_INSTANCE_NAME | The specified instance name is invalid. |
| LOCALDB_ERROR_INVALID_PARAMETER | One or more specified input parameters are invalid. |
| LOCALDB_ERROR_NOT_INSTALLED | SQL Server Express LocalDB isn't installed on the computer. |
| LOCALDB_ERROR_SHARED_NAME_TAKEN | The specified shared name is already taken. |
| LOCALDB_ERROR_SQL_SERVER_STARTUP_FAILED | A SQL Server process was started, but SQL Server startup failed. |
| LOCALDB_ERROR_TOO_MANY_SHARED_INSTANCES | There are too many shared instances. |
| LOCALDB_ERROR_UNKNOWN_ERROR_CODE | The requested message doesn't exist. |
| LOCALDB_ERROR_UNKNOWN_INSTANCE | The instance doesn't exist. |
| LOCALDB_ERROR_UNKNOWN_LANGUAGE_ID | The message isn't available in the requested language. |
| LOCALDB_ERROR_UNKNOWN_VERSION | The specified version isn't available. |
| LOCALDB_ERROR_VERSION_REQUESTED_NOT_INSTALLED | The specified patch level isn't installed. |
| LOCALDB_ERROR_WAIT_TIMEOUT | A timeout occurred while trying to acquire the synchronization locks. |
| LOCALDB_ERROR_XEVENT_FAILED | Failed to start XEvent engine within the LocalDB Instance API. |