Error starting SQL Server in single user mode


I have SQL Server 2014 and I try to start SQL Server in single user mode by executing the next command:

sqlservr.exe -m -c -s YOGAARNE\SQLEXPRESS

This gives the next error:

'Your SQL Server Installation is either corrupt or has been tampered with ( Error: Instance name exceeds maximum length)'

How do I solve this error?


Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

HuaMin ChenProblem resolverCommented:
Can you follow this procedure below

and try to do it?

BTW, are you able to start your Sql server DB ever?
Vikas GargBusiness Intelligence DeveloperCommented:

This is either done using the net start/stop command

The syntax for a net start/stop command is


The method for the same shown in this LINK

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Vitor MontalvãoMSSQL Senior EngineerCommented:
'Your SQL Server Installation is either corrupt or has been tampered with ( Error: Instance name exceeds maximum length)'
Are you trying to start it in single user mode because you had a problem with it? If so, what's the problem?
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

adiemeerAuthor Commented:
@Vitor: yes I have a problem with SQL Server. The solution is described at this page: This works fine for a colleague of me, but I get the error at the moment I want to start in single user mode.
Vitor MontalvãoMSSQL Senior EngineerCommented:
This works fine for a colleague of me,
Isn't working on the same SQL Server instance as you, right?
Can you start SQL Server instance in multiple user mode? If so, you can just disabled all user logins so no one can connect but you.
adiemeerAuthor Commented:
Thanks! This solution works for me!
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SQL Server

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.