error: 26 - Error Locating Server/Instance Specified

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

Does anyone know what could be wrong ?

Check if the local/remote connections have been enabled for ur instamce....Launcg SQL Server Surface Area configuration...Connections and services...Check Local and Network connections.....|||Looks like you are trying to connect a remote named instance. To make it work, SQL Browser on the remote server must be enabled, UDP port 1434 should be put into exception if firewall presents.|||

I installed SQL Server 2005 and I unable to connect my client Machine. I Created a DSN to connect to the Database through ODBC. Locally I am testing and everything works fine. The error is “SQL Server not Exist or Access Denied” on a client machine. I m using SQL server authentication with Mix mode installation and default Instance name as the Machine Name. If, I connect through Windows Authentication mode then it shows the Error “General Network Error contact to Network Administrator Documentation” On client machine I am also connecting through Visual Studio 2005 Server Explorer but connection showing no database. What should I do to connect my client machine? If I create a New SQL Server Database Name in Server Explorer of Visual Studio 2005 it will give the Error Message “under the Default Setting SQL Server does not allow remote connection Network (provider: SQL Network Interface, Error: 26 – Error Locating Server / Instance Specified)

I already change the Remote Connection to Local & Remote Connection and choosing Option Use TCP/IP. But not succeeded

THANKS IF ANY BODY SOLVE MY PROBLEM

|||

Naeem Sheikh wrote:

I installed SQL Server 2005 and I unable to connect my client Machine. I Created a DSN to connect to the Database through ODBC. Locally I am testing and everything works fine. The error is “SQL Server not Exist or Access Denied” on a client machine. I m using SQL server authentication with Mix mode installation and default Instance name as the Machine Name. If, I connect through Windows Authentication mode then it shows the Error “General Network Error contact to Network Administrator Documentation” On client machine I am also connecting through Visual Studio 2005 Server Explorer but connection showing no database. What should I do to connect my client machine? If I create a New SQL Server Database Name in Server Explorer of Visual Studio 2005 it will give the Error Message “under the Default Setting SQL Server does not allow remote connection Network (provider: SQL Network Interface, Error: 26 – Error Locating Server / Instance Specified)

I already change the Remote Connection to Local & Remote Connection and choosing Option Use TCP/IP. But not succeeded

THANKS IF ANY BODY SOLVE MY PROBLEM

Thnanks i wonder firewall is blocking my tcp/ip port and now i am connecting to the server|||Yes. It that is necessary.

error: 26 - Error Locating Server/Instance Specified

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

Does anyone know what could be wrong ?

Check if the local/remote connections have been enabled for ur instamce....Launcg SQL Server Surface Area configuration...Connections and services...Check Local and Network connections.....|||Looks like you are trying to connect a remote named instance. To make it work, SQL Browser on the remote server must be enabled, UDP port 1434 should be put into exception if firewall presents.|||

I installed SQL Server 2005 and I unable to connect my client Machine. I Created a DSN to connect to the Database through ODBC. Locally I am testing and everything works fine. The error is “SQL Server not Exist or Access Denied” on a client machine. I m using SQL server authentication with Mix mode installation and default Instance name as the Machine Name. If, I connect through Windows Authentication mode then it shows the Error “General Network Error contact to Network Administrator Documentation” On client machine I am also connecting through Visual Studio 2005 Server Explorer but connection showing no database. What should I do to connect my client machine? If I create a New SQL Server Database Name in Server Explorer of Visual Studio 2005 it will give the Error Message “under the Default Setting SQL Server does not allow remote connection Network (provider: SQL Network Interface, Error: 26 – Error Locating Server / Instance Specified)

I already change the Remote Connection to Local & Remote Connection and choosing Option Use TCP/IP. But not succeeded

THANKS IF ANY BODY SOLVE MY PROBLEM

|||

Naeem Sheikh wrote:

I installed SQL Server 2005 and I unable to connect my client Machine. I Created a DSN to connect to the Database through ODBC. Locally I am testing and everything works fine. The error is “SQL Server not Exist or Access Denied” on a client machine. I m using SQL server authentication with Mix mode installation and default Instance name as the Machine Name. If, I connect through Windows Authentication mode then it shows the Error “General Network Error contact to Network Administrator Documentation” On client machine I am also connecting through Visual Studio 2005 Server Explorer but connection showing no database. What should I do to connect my client machine? If I create a New SQL Server Database Name in Server Explorer of Visual Studio 2005 it will give the Error Message “under the Default Setting SQL Server does not allow remote connection Network (provider: SQL Network Interface, Error: 26 – Error Locating Server / Instance Specified)

I already change the Remote Connection to Local & Remote Connection and choosing Option Use TCP/IP. But not succeeded

THANKS IF ANY BODY SOLVE MY PROBLEM

Thnanks i wonder firewall is blocking my tcp/ip port and now i am connecting to the server|||Yes. It that is necessary.

error: 26 - Error Locating Server/Instance Specified

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

Does anyone know what could be wrong ?

Check if the local/remote connections have been enabled for ur instamce....Launcg SQL Server Surface Area configuration...Connections and services...Check Local and Network connections.....|||Looks like you are trying to connect a remote named instance. To make it work, SQL Browser on the remote server must be enabled, UDP port 1434 should be put into exception if firewall presents.|||

I installed SQL Server 2005 and I unable to connect my client Machine. I Created a DSN to connect to the Database through ODBC. Locally I am testing and everything works fine. The error is “SQL Server not Exist or Access Denied” on a client machine. I m using SQL server authentication with Mix mode installation and default Instance name as the Machine Name. If, I connect through Windows Authentication mode then it shows the Error “General Network Error contact to Network Administrator Documentation” On client machine I am also connecting through Visual Studio 2005 Server Explorer but connection showing no database. What should I do to connect my client machine? If I create a New SQL Server Database Name in Server Explorer of Visual Studio 2005 it will give the Error Message “under the Default Setting SQL Server does not allow remote connection Network (provider: SQL Network Interface, Error: 26 – Error Locating Server / Instance Specified)

I already change the Remote Connection to Local & Remote Connection and choosing Option Use TCP/IP. But not succeeded

THANKS IF ANY BODY SOLVE MY PROBLEM

|||

Naeem Sheikh wrote:

I installed SQL Server 2005 and I unable to connect my client Machine. I Created a DSN to connect to the Database through ODBC. Locally I am testing and everything works fine. The error is “SQL Server not Exist or Access Denied” on a client machine. I m using SQL server authentication with Mix mode installation and default Instance name as the Machine Name. If, I connect through Windows Authentication mode then it shows the Error “General Network Error contact to Network Administrator Documentation” On client machine I am also connecting through Visual Studio 2005 Server Explorer but connection showing no database. What should I do to connect my client machine? If I create a New SQL Server Database Name in Server Explorer of Visual Studio 2005 it will give the Error Message “under the Default Setting SQL Server does not allow remote connection Network (provider: SQL Network Interface, Error: 26 – Error Locating Server / Instance Specified)

I already change the Remote Connection to Local & Remote Connection and choosing Option Use TCP/IP. But not succeeded

THANKS IF ANY BODY SOLVE MY PROBLEM

Thnanks i wonder firewall is blocking my tcp/ip port and now i am connecting to the server|||Yes. It that is necessary.

error: 26 - Error Locating Server/Instance Specified

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)

Does anyone know what could be wrong ?

Check if the local/remote connections have been enabled for ur instamce....Launcg SQL Server Surface Area configuration...Connections and services...Check Local and Network connections.....|||Looks like you are trying to connect a remote named instance. To make it work, SQL Browser on the remote server must be enabled, UDP port 1434 should be put into exception if firewall presents.|||

I installed SQL Server 2005 and I unable to connect my client Machine. I Created a DSN to connect to the Database through ODBC. Locally I am testing and everything works fine. The error is “SQL Server not Exist or Access Denied” on a client machine. I m using SQL server authentication with Mix mode installation and default Instance name as the Machine Name. If, I connect through Windows Authentication mode then it shows the Error “General Network Error contact to Network Administrator Documentation” On client machine I am also connecting through Visual Studio 2005 Server Explorer but connection showing no database. What should I do to connect my client machine? If I create a New SQL Server Database Name in Server Explorer of Visual Studio 2005 it will give the Error Message “under the Default Setting SQL Server does not allow remote connection Network (provider: SQL Network Interface, Error: 26 – Error Locating Server / Instance Specified)

I already change the Remote Connection to Local & Remote Connection and choosing Option Use TCP/IP. But not succeeded

THANKS IF ANY BODY SOLVE MY PROBLEM

|||

Naeem Sheikh wrote:

I installed SQL Server 2005 and I unable to connect my client Machine. I Created a DSN to connect to the Database through ODBC. Locally I am testing and everything works fine. The error is “SQL Server not Exist or Access Denied” on a client machine. I m using SQL server authentication with Mix mode installation and default Instance name as the Machine Name. If, I connect through Windows Authentication mode then it shows the Error “General Network Error contact to Network Administrator Documentation” On client machine I am also connecting through Visual Studio 2005 Server Explorer but connection showing no database. What should I do to connect my client machine? If I create a New SQL Server Database Name in Server Explorer of Visual Studio 2005 it will give the Error Message “under the Default Setting SQL Server does not allow remote connection Network (provider: SQL Network Interface, Error: 26 – Error Locating Server / Instance Specified)

I already change the Remote Connection to Local & Remote Connection and choosing Option Use TCP/IP. But not succeeded

THANKS IF ANY BODY SOLVE MY PROBLEM

Thnanks i wonder firewall is blocking my tcp/ip port and now i am connecting to the server|||Yes. It that is necessary.

Error, while connecting with SQL Server 2005 express edition

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact under the default settings of SQL SERver does not allow remote connections.
(provider:Named Pipes Provider, error: 40-Could not open a connection to SQL Server)

Hi,

Did you enabled setting to allow remote connection? Please see the blog for setup Remote connection

http://blogs.msdn.com/sqlexpress/

Hope that helps,

Lan

|||abrahampackiaraj
thank you, I already verified the tick mark in the check box of"allow remote connections" and I restarted the system. but this errorfollows up|||

did you manage to solve this problem as i have the same issue

Thanks

|||but while installing asp.net 2.0 , it doesn't even ask for that option. where from i can get that...|||whre from you got the option to tick the check box of "allow remote connections", i dont find that..|||

You can find it in SQL Server Surface Area Configuration. You may take a look at this post:

http://forums.asp.net/thread/1347652.aspx

Error with establishing a connection to the server

i cannot access my database as i am keep getting the following error:

"When connecting to SQL server 2005, this failure may be caused by the fact that under the default settings SQL server does not allow remote connections. (provider:shared memory provider, error: 40 - could not open a connection to SQL server)"

when i click on the properties window i cannot see my table nor can i make a new connection as the same error is shown, could you please advice me how i can fix this?

Make sure the SQL Server 2005 service is running.

Are you able to connect to the server through Query Analyzer ?

Visitwww.connectionstrings.com to know how to build a connection string for your scenario.

Error while trying to connect to another SQL Server Express machine

The error states:

Additional Information:
An error has occured while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that unthe default settings SQL Server does not allow remote connections.

How do I correct this issue?

Thanks,

Steve C.

By default, SQL Server 2005 Express Edition disables network access / remote connections. This is for security purposes. We want this enabled explicitly should someone have a need for it. Here is a KB article that talks about ways to enable remote connections http://support.microsoft.com/default.aspx?scid=kb%3bEN-US%3b914277

Thank You

Ajay

Error while establishing connection with sql server 2005 express

An error has occurred while establishing a connection to the server.
When connecting to SQL server 2005, this failure may be caused by the
fact that under the default settings SQL server does not allow remote
connections. [provider: Named Pipes Provider, error: 40 - Could not
open a connection to SQL Server]

the above was my error and i got a solution from y71chen as below

Problem solved...it turn out that in ASP.NET SQL server setup wizard when it asks for server name, I have to specifiy theinstance name as well as the server name when MS refer to "Server Name" they really mean "Server Instance Name") eg if your server was named 'bigturnip' then you need to specify 'bigturnip\sqlexpress' (where sqlexpress is the instance name - this one just happens to be the default used by SQL Server 2005 SQLExpress). By default the server name was entered as merely "bigturnip" but after i added "\sqlexpress", then everything worked. If anyone else is having this remote connection problem and when they did select remote connection and still does not work this is the way to solve the problem....

but my doubt is do i want to install my software again for specifying the instance name along with the server name or where can i go and specify the instance name.

regards

kalyan

Which software do you want to re-install? Are you referring to VS2005? I remember that there is not step during the installtion of VS2005 that allows you to specify the instance name for SQL Express; and the instance name is default to SQLExpress, while the server name is your computer name which can not be assigned other string.|||

i had the same problem as you describe above but still when i added \sqlexpress to my connection string, i got the error below. Help please.

Cannot open database "mydatabase.mdf" requested by the login. The login failed.
Login failed for user 'domain\myusername'.

Error while establishing a connection to the SQL server 2005 - Could not open a connection

Hi,

I had an old web application created during asp.net 1.1 and it have a connection problem with the sql server 2005 when it is mirgrated to a new webserver with dotnet framework 2.0 platform. I have enabled the remote access(TCP/IP and named pipes) in sql server 2005, did all the neccessary things, check whether the TCP/IP is enabled, named pipe is enabled...

I created another web application using VS 2005. The database connection works perfectly well.

This are the connectionString from the old web application.

<appSettings>
<addkey="ConnectionString"value="Server=127.0.0.1;Database=somedb;User id=user; Password=somepassword; Trusted_Connection=False; POOLING=FALSE"/>
</appSettings>

Thankyou in advance!

I am not sure but maybe try this?

<appSettings>
<addk="ConnectionString"value="Server=127.0.0.1;Database=somedb;User id=user; Password=somepassword;"/>
</appSettings>

or

<appSettings>
<addk="ConnectionString"value="workstation id="computername";packet size=4096;data source=yourserver;initial catalog=yourdatabase ;user id=user;password=password"/>
</appSettings>

|||

Thank jpazgier for your help. I have tried and tested it out. However the problem still exist.. =(

|||Could you provide code where you use your connection string? How you read it from config file and how you use it to get data?|||

Hi,

This error message is just a basic connectivity error meaning the client could not connect to the target SQL Server. So just follow the basic connectivity troubleshooting guidelines on our SQL Protocols blog, see:

SQL Server 2005 Connectivity Issue Troubleshoot - Part I
http://blogs.msdn.com/sql_protocols/archive/2005/10/22/483684.aspx

and

SQL Server 2005 Connectivity Issue Troubleshoot - Part II
http://blogs.msdn.com/sql_protocols/archive/2005/10/29/486861.aspx
This should help you debug the problem.