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SQL Server troubleshooting


Connectivity issues

  • 945627 - You may encounter connectivity issues when you connect an application to SQL Server 2008 CTP


  • 307197 - SQL Server cannot bind to the TCP/IP port on which SQL Server is listening when the TCP\IP port is used by another application
  • 307864 - Error message when you connect to an instance of SQL Server: "Cannot open user default database"
  • 318432 - BUG: Cannot Connect to a Clustered Named Instance Through a Firewall
  • 888228 - You receive a "SQL Server does not exist or access denied" error message when you try to connect to a SQL Server named instance in a cluster by using TCP/IP sockets
  • 900487 - You cannot connect to a default instance of SQL Server 2005 through a firewall by using the SQL Server networking interface (SNI)
  • 905618 - You may receive an error message when you try to connect to an instance of SQL Server 2000 or SQL Server 7.0 that was installed after you installed SQL Server 2005
  • 912412 - Error message when you use Service Broker or database mirroring to connect to an instance of SQL Server 2005: "Connection handshake failed"
  • 916782 - You may receive an error message when a SQL Server 2005 client requests encryption and connects to 127.0.0.1 on a Windows XP-based computer
  • 919710 - Error message when you try to connect to an instance of SQL Server 2005: "No process is on the other end of the pipe" or "An existing connection was forcibly closed by the remote host"
  • 929152 - You cannot connect to a local instance of SQL Server on a Windows XP-based computer or on a Windows 2000-based computer when you use "localhost" in the pipe name
  • 934751 - Error message when you log on to an instance of Microsoft SQL Server 2005 from SQL Server Management Studio: "Timeout expired. This timeout period elapsed prior to completion of the operation or the server is not responding"
  • 942003 - Error message on a Windows Vista-based computer when you try to connect to Microsoft SQL Server Management Studio by using a VPN connection: "The user is not associated with a trusted SQL Server Connection"
  • 942861 - Error message when an application connects to SQL Server on a server that is running Windows Server 2003: "General Network error," "Communication link failure," or "A transport-level error"
  • 944390 - Error message when you connect to a named instance of SQL Server on a client computer that is running Windows Vista or Windows Server 2008: "Specified SQL server not found" or "Error Locating Server/Instance Specified"


  • SQL Server 2005 Connectivity Issue Troubleshooter - Part I
  • SQL Server 2005 Connectivity Issue Troubleshooter - Part II