我能够毫无问题地连接到
(localdb)\MSSQLLocalDB我得到的错误是：
无法连接到 (localdb)\MSSQLLocalDB。
附加信息：
发生网络相关或特定于实例的错误 建立与 SQL Server 的连接。找不到服务器或 无法访问。验证实例名称是否正确 SQL Server 配置为允许远程连接。 （提供者：SQL 网络接口，错误：50 - 发生本地数据库运行时错误。 LocalDB 实例启动期间发生错误：SQL Server 进程 启动失败。）（Microsoft SQL Server）
有人以前遇到过这个问题，并且知道如何解决吗？我在上面找不到任何东西:\
事件日志有以下内容；
Windows API 调用 WaitForMultipleObjects 返回错误代码：575。 Windows 系统错误消息为：{应用程序错误}应用程序 无法正确启动（0x%lx）。单击“确定”关闭 应用。举报电话：3728.
SQL Server 日志具有以下内容：
{Date} {Time} Server Microsoft SQL Server 2014 - 12.0.4100.1 (X64)
Apr 20 2015 17:29:27
Copyright (c) Microsoft Corporation
Express Edition (64-bit) on Windows NT 6.3 <X64> (Build 9600: ) (Hypervisor)
{Date} {Time} Server UTC adjustment: 10:30
{Date} {Time} Server (c) Microsoft Corporation.
{Date} {Time} Server All rights reserved.
{Date} {Time} Server Server process ID is 4392.
{Date} {Time} Server System Manufacturer: {Manufacturer}, System Model: {Model}.
{Date} {Time} Server Authentication mode is MIXED.
{Date} {Time} Server Logging SQL Server messages in file 'C:\Users\{user}\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\MSSQLLocalDB\error.log'.
{Date} {Time} Server The service account is '{domain}\{user}'. This is an informational message; no user action is required.
{Date} {Time} Server Command Line Startup Parameters:
-c
-S "MSSQL12E.LOCALDB"
-s "LOCALDB#6A0C87E6"
-d "C:\Users\{user}\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\MSSQLLocalDB\master.mdf"
-l "C:\Users\{user}\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\MSSQLLocalDB\mastlog.ldf"
-e "C:\Users\{user}\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\MSSQLLocalDB\error.log"
{Date} {Time} Server SQL Server detected 1 sockets with 4 cores per socket and 4 logical processors per socket, 4 total logical processors; using 4 logical processors based on SQL Server licensing. This is an informational message; no user action is required.
{Date} {Time} Server SQL Server is starting at normal priority base (=7). This is an informational message only. No user action is required.
{Date} {Time} Server Detected 7113 MB of RAM. This is an informational message; no user action is required.
{Date} {Time} Server Using conventional memory in the memory manager.
{Date} {Time} Server Default collation: SQL_Latin1_General_CP1_CI_AS (us_english 1033)
{Date} {Time} Server The maximum number of dedicated administrator connections for this instance is '1'
{Date} {Time} Server Node configuration: node 0: CPU mask: 0x000000000000000f:0 Active CPU mask: 0x000000000000000f:0. This message provides a description of the NUMA configuration for this computer. This is an informational message only. No user action is required.
{Date} {Time} Server Using dynamic lock allocation. Initial allocation of 2500 Lock blocks and 5000 Lock Owner blocks per node. This is an informational message only. No user action is required.
{Date} {Time} Server Software Usage Metrics is disabled.
{Date} {Time} spid8s Starting up database 'master'.
{Date} {Time} spid8s 24 transactions rolled forward in database 'master' (1:0). This is an informational message only. No user action is required.
{Date} {Time} spid8s 0 transactions rolled back in database 'master' (1:0). This is an informational message only. No user action is required.
{Date} {Time} Server CLR version v4.0.30319 loaded.
{Date} {Time} Server Common language runtime (CLR) functionality initialized using CLR version v4.0.30319 from C:\Windows\Microsoft.NET\Framework64\v4.0.30319\.
{Date} {Time} spid8s SQL Server Audit is starting the audits. This is an informational message. No user action is required.
{Date} {Time} spid8s SQL Server Audit has started the audits. This is an informational message. No user action is required.
{Date} {Time} spid8s SQL Trace ID 1 was started by login "sa".
{Date} {Time} spid8s Server name is '{ComputerName}\LOCALDB#6A0C87E6'. This is an informational message only. No user action is required.
{Date} {Time} spid14s Server local connection provider is ready to accept connection on [ \\.\pipe\LOCALDB#6A0C87E6\tsql\query ].
{Date} {Time} spid14s Dedicated administrator connection support was not started because it is disabled on this edition of SQL Server. If you want to use a dedicated administrator connection, restart SQL Server using the trace flag 7806. This is an informational message only. No user action is required.
{Date} {Time} spid8s Error: 17204, Severity: 16, State: 1.
{Date} {Time} spid8s FCB::Open failed: Could not open file E:\sql12_main_t.obj.x86Release\sql\mkmastr\databases\mkmastr.proj\MSDBData.mdf for file number 0. OS error: 3(The system cannot find the path specified.).
{Date} {Time} spid8s Error: 5120, Severity: 16, State: 101.
{Date} {Time} spid8s Unable to open the physical file "E:\sql12_main_t.obj.x86Release\sql\mkmastr\databases\mkmastr.proj\MSDBData.mdf". Operating system error 3: "3(The system cannot find the path specified.)".
{Date} {Time} spid12s Starting up database 'mssqlsystemresource'.
{Date} {Time} spid12s The resource database build version is 12.00.4100. This is an informational message only. No user action is required.
{Date} {Time} spid12s Starting up database 'model'.
{Date} {Time} spid12s Error: 17204, Severity: 16, State: 1.
{Date} {Time} spid12s FCB::Open failed: Could not open file E:\sql12_main_t.obj.x86Release\sql\mkmastr\databases\mkmastr.proj\model.mdf for file number 1. OS error: 3(The system cannot find the path specified.).
{Date} {Time} spid12s Error: 5120, Severity: 16, State: 101.
{Date} {Time} spid12s Unable to open the physical file "E:\sql12_main_t.obj.x86Release\sql\mkmastr\databases\mkmastr.proj\model.mdf". Operating system error 3: "3(The system cannot find the path specified.)".
{Date} {Time} spid12s Error: 17207, Severity: 16, State: 1.
{Date} {Time} spid12s FileMgr::StartLogFiles: Operating system error 2(The system cannot find the file specified.) occurred while creating or opening file 'E:\sql12_main_t.obj.x86Release\sql\mkmastr\databases\mkmastr.proj\modellog.ldf'. Diagnose and correct the operating system error, and retry the operation.
{Date} {Time} spid12s File activation failure. The physical file name "E:\sql12_main_t.obj.x86Release\sql\mkmastr\databases\mkmastr.proj\modellog.ldf" may be incorrect.
{Date} {Time} spid12s Error: 945, Severity: 14, State: 2.
{Date} {Time} spid12s Database 'model' cannot be opened due to inaccessible files or insufficient memory or disk space. See the SQL Server errorlog for details.
{Date} {Time} spid12s SQL Server shutdown has been initiated
{Date} {Time} spid12s SQL Trace was stopped due to server shutdown. Trace ID = '1'. This is an informational message only; no user action is required.
请注意；我没有，也从未有过
E:\我最终删除并重新创建了实例。
IE。
Open command prompt
-> cd %localappdata%\Microsoft\Microsoft SQL Server Local DB\Instances\MSSQLLocalDB
-> sqllocaldb delete mssqllocaldb
-> sqllocaldb create mssqllocaldb
-> sqllocaldb start mssqllocaldb
非常感谢。 “提供商：SQL 网络接口。错误：50 - 发生本地数据库运行时错误。”根据您的回答，错误已解决。