Error 26 error locating server instance specified microsoft sql server

Here are the steps: 1 Make sure your server name is correct, e. Once you are done the steps, you should not see this error message anymore. You may still fail to connect your SQL server, but error message should be different and you have a different issue now. That way, you can isolate the issue a little bit. There is one corner case where you may still fail after you checked step 1 It happens when a your server is a named instance on cluster or on a multi-homed machine, and b your client is a Vista machine with Firewall on.

Can you double check if sqlbrowser service is disabled or not using services. In addition, you can check eventvwr to see what happened. The strange thing is this also happened to a few other remote users, but most remote users have no issue connecting to the named instance.

Therefore we know that sql browser is running fine on the server. Do you know what the cause is? Would you show me how to trace what happened on my client machine? Below is my test. Note that I can connect to the inst3 successfully if I specify the port explicitly. When connecting to SQL Server , this failu re may be caused by the fact that under the default settings SQL Server does not allow remote connections..

Exception Details: System. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. SqlClient" in the file web. I had the exact same error message during the new install of SQL Server.

Starting this fixed the issue. This issue is driving me insane. Developed to use the connection string from the web. Works in development and it works in production if using ASP.

NET website. Does not work for a particular application in the bin directory. Thought it was a good idea to create a layer of abstraction and embed the data calls in a.

Any and all help is greatly appreciated. SqlException 0x : A network-related or instance-specific error occurred while establishing a connection to SQL Server.

ThrowExceptionAndWarning at System. Open at System. InitializeProviderMode at System. Execute Expression query at System. Execute[S] Expression expression at System. Sign in. United States English. Ask a question. Quick access. Search related threads. Remove From My Forums. Answered by:. Archived Forums. Getting started with SQL Server. Beginners just getting started - here's the place for help with simple questions.

For installation or setup questions, refer to the Setup Forum. Sign in to vote. Friday, July 28, PM. Looks like you are trying to connect a remote named instance. Tuesday, August 15, PM. Connections and services Check Local and Network connections Friday, August 11, AM.

Sunday, September 10, AM. It that is necessary. Monday, March 19, PM. I'm getting the same error, but my setup might be a bit different.

Tuesday, October 23, PM. Anything else I might be missing? Thursday, October 25, PM. I figured it out. And getting following error. When connecting to SQL Server , this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.

Change the authentication mode to mixed from Windows, Following are the steps to be followed. On the General page, you might have to create and confirm a password for the sa login. To do this, follow these steps:.

Important These steps may increase your security risk. These steps may also make your computer or your network more vulnerable to attack by malicious users or by malicious software such as viruses. We recommend the process that this article describes to enable programs to operate as they are designed to, or to implement specific program capabilities. Before you make these changes, we recommend that you evaluate the risks that are associated with implementing this process in your particular environment.

If you choose to implement this process, take any appropriate additional steps to help protect your system. We recommend that you use this process only if you really require this process. Note When you run the SQL Server Browser service on a computer, the computer displays the instance names and the connection information for each instance of SQL Server that is running on the computer.

If you are using a different firewall system, see your firewall documentation for more information. To obtain an instance ID, follow these steps:. To open Windows Firewall, click Start , click Run , type firewall.