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Named Pipes Provider, error: 40 - Could not open a connection to SQL Server

Posted By:      Posted Date: September 24, 2010    Points: 0   Category :Sql Server
 

This was originally posted in the SSIS Forum, but a member of the IS team suggested it be moved here.  "Most recently I got this error (Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) so does this mean that SQL Server is still trying to use named pipes even if I only have TCP/IP enabled in SQL Server Configuration Manager?"

I'm having the same issue, and here's our scenario:

  1. Installed SQL Server 2005 Developer Edition on a machine with WinXP SP2 and enabled remote connections over TCP/IP
  2. Installed SQL Server 2005 Standard Edition on a machine with Win2003 SP1 (remote connections over TCP/IP enabled by default)
  3. Attempted to 'Copy Database' from Developer Edition TO Standard Edition using 'Detach and Attach' method and recieved the error on the Win2003 machine: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server
  4. A


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provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server

  
after lots  of goes and back, I have the same problem but it is related to my Visual studio too. Because I can access to the same database  for new projects but when I use an existing project with a new default page I get the same error.
I am using visual studio 2005 connecting to MSSQL 2008 in server that has an instance of SQLServer express 2005 too
the code for boht new and existing project is bellow

I appricate any help

 

protected void Page_Load(object sender, EventArgs e)

{

 

SqlConnection cn =

provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server

  

On windows 2008 using sql 2k8 standard edition. I have a couple of apps that run on the server. One works perfectly and attaches to sql with no problem. The second app that uses THE EXACT SAME CONNECTION STRING and gives me the following error,

provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server

How can one app work and the other not? What can I check for?

Thanks,


Named Pipes Provider: Could not open a connection to SQL Server [2]

  
Hi

I'm a complete sql/asp.net newbie and want to try this tutorial:
http://beta.asp.net/GuidedTour/

First I installed:
Visual Web Developer 2005 Express Edition Beta 2

systemsettings\software shows the "sql server 2005 express edition ctp (sqlexpress)" installed

mmc\service shows me the SQL Server (SQLExpress) is running

Following the guided tour I use the commandline, type cmd, and type in the commandbox:
 
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Instead of localhost I also tried computername.smallbusiness.local (thats my fully domain name).

However I always receive the error:

Named Pipes Provider: Could not open a connection to SQL Server [2]

Thank you very much for all your help


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