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I'm the administrator and simply run the command:

 sqllocaldb start v11.0


 Start of LocalDB instance "v11.0" failed because of the following error:
 Error occurred during LocalDB instance startup: SQL Server process failed to sta

Event viewer log Event ID: 528

Windows API call WaitForMultipleObjects returned error code: 575. Windows system error message is: {Application Error} The application was unable to start correctly (0x%lx). Click OK to close the application. Reported at line: 3621.

I tried another (user and administrator) accounts, there were no problems with them.

I uninstalled & reinstalled 2012 version of SQLLocalDB.msi but I had no luck. Do you have any idea & fix?

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Visual Studio had trouble starting my project and I saw the same error in the event log. Fixed it by running sqllocaldb start v11.0. – Andre Luus Apr 9 '13 at 6:51

Check the error log which usually under the folder C:\Users\\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\v11.0 will give you big hints.

Log back in as the administrator account (not an administrator), and start a command prompt with Run As Administrator. Then run this:

sqllocaldb share v11.0 MyInstance

You might want to explicitly add your Windows account as a sysadmin on this instance if that is a goal. So:

sqllocaldb start MyInstance

Then connect with SQLCMD, Management Studio, what have you, and run:

EXEC sp_addsrvrolemember N'Domain\Username', N'sysadmin';

Now log back in as your Windows account, and you should be able to start this instance using:

sqllocaldb start MyInstance

(It may already be started depending on your O/S and how you switched accounts.)

Then Domain\Username should be able to connect using SQLCMD, SSMS etc. using (localdb)\.\MyInstance.

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This is a good workaround but it can't explain & solve the problem. – Nime Cloud Dec 17 '12 at 12:50
@NimeCloud um, ok, maybe someone else will come along with a better "fix." <shrug> – Aaron Bertrand Dec 17 '12 at 14:27
up vote 7 down vote accepted

I logged off and then logged in as another administrator and renamed my user profile folder's name. I switched into my account in Windows 7. There is a newly created TEMP folder as my user profile folder. I compared before & after folder structure as in picture. Plus; LocalDB instance started successfully.


I logged off and renamed my username to original. Logged again & jumped into that folder:

C:\Users\MYUSERNAME\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\v11.0

And saw the error logs; Access denied!

Solution: Simply delete all files in v11.0 folder. Give write permision to v11.0 folder. If you can't create another instance give write permission to Instances folder.

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Deleted the v11.0 folder. Then issued sqllocaldb.exe c v11.0 to recreate it (in VS2013 developer command line, elevated). This solved it. – cheeesus Apr 21 '15 at 17:16

I had this once and a simple reboot solved it. Seems to have solved it for other people too. Maybe worth attempting before doing Nime & Aarons answers

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I used to have this problem when my localdb and sql instance was installed with a different user than the current (domain user), so I fixed this by clearing the V11.0 folder and pasting the mdf and ldf files from the old path :

C:\Users\{inseryouroldusernamehere}\AppData\Local\Microsoft\Microsoft SQL Server Local DB\Instances\v11.0

Hope it helps.

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I opened services.msc and restarted the following services:

  • Sql Server Browser
  • Sql Server VSS Writer

Hope it helps

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