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sql server error 40 could not open a connection

SQL Server Error 40 Could not open connection Named Pipes Provider, error: 40

Error Details:

SQL Server Error 40 Could not open connection Named Pipes Provider, error: 40 or sql server error 40 named pipes provider and other forms of error below

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) (Microsoft SQL Server, Error: 1326)

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ERROR: (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error:) An error has occurred while establishing a connection Read the rest