Network-related or instance-specific errors occur when you establish a connection. The server is not found or cannot be accessed. Verify that the Instance name is correct and SQL server is configured to allow remote connection.

Network-related or instance-specific errors occur when you establish a connection with SQL Server. Server not found or inaccessibleServer. Verify that the Instance name is correct and SQL server is configured to allow remote connection.(Provider: named pipeline providesProgram, Error: 40-unable to open the connection to SQL Server) Note:An error occurred while executing the current Web request. Check the stack trace information to learn about this error andCodeDetailed information about the cause of the error.

Exception details:System. Data. sqlclient. sqlexception: Network-related or instance-specific errors occur when you establish a connection with SQL Server. The server is not found or cannot be accessed. Verify that the Instance name is correct and SQL server is configured to allow remote connection. (Provider: named pipeline provider, error: 40-unable to open the connection to SQL Server)

Provider: named pipeline provider, error: 40-unable to open the connection to SQL Server

Solution:

1. Start-> sqlserver2005-> Configuration tool-> peripheral application configurator->

Application configurator for service and peripheral connection-> click "remote connection"-> Local Connection and remote connection->

Use TCP/IP and named pipes at the same time-> click "OK"-> restart sqlserver Service

2. A database connection string error may occur. Please check.