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SQL server error 26- Unable to connect to SQL Express Error: 26-Error Locating Server/Instance Specified
Error Details: this sql server error 26 error locating server instance message is often encountered when connection to a SQL Server is tried and don’t know where to start to solve the problem.
We get this sql server error 26 error message only when we are trying to connect to a SQL Server named instance.
Every time we try to make a connection to SQL Server named instance, we will send a SSRP UDP packet to the server machine UDP port 1434. We need this step to know configuration information of the SQL instance, e.g., protocols enabled, TCP port, pipe name etc. Without these information, client does know how to connect the server and it fails with this specified error message sql server error 26 error locating server instance.
provider: named pipes provider, error: 40 – could not open a connection to sql server which is covered here.
7 ways for resolving the sql server error 26 which is for connecting from Windows PC/Client to Windows server/SQL Server (server with SQL Server installed) and are getting the sql error 26 above then we need to check following:
On Windows SQL Server if we are trying to connect to Named instance then 1-2 steps are related. If default instance then all other steps for resolving sql server error 26 error locating server instance
Make sure your database engine is configured to accept remote connection. Right click on instance to go to properties page and make sure its enabled to accept remote connections.
If we are connecting to a named SQL Server instance, make sure that instance name in your connection string is right. Usually the format needed to specify the database server is Servername\instancename or in your connection string is right format with right instance name.
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