---
title: "LOCALDB_ERROR_SQL_SERVER_STARTUP_FAILED | Microsoft Docs"
ms.custom: ""
ms.date: "03/04/2017"
ms.prod: sql
ms.reviewer: ""
ms.technology: performance
ms.topic: "reference"
ms.assetid: e3e5e5dc-21dc-42fc-82a6-730fed46ef16
author: "stevestein"
ms.author: "sstein"
---
# LOCALDB_ERROR_SQL_SERVER_STARTUP_FAILED
[!INCLUDE[appliesto-ss-xxxx-xxxx-xxx-md](../../includes/appliesto-ss-xxxx-xxxx-xxx-md.md)]
    
## Details  
  
|||  
|-|-|  
|Product Name|SQL Server|  
|Event ID|266|  
|Event Source|SQL Server Local Database Runtime 12.0|  
|Component|Local Database Runtime API|  
|Message Text|Error occurred during Local Database instance startup: SQL Server process failed to start.|  
  
## Explanation  
 A SQL Server process is started but SQL Server startup failed.  
  
## User Action  
 See the event log for details.