Provider named pipes provider error 40 visual studio

First published on MSDN on Mar 31, 2007

This error was most frequently hitted by our customers, and in this post, give a brief summary of troubleshooting tips for this specific error message.

First, take a look at below MSDN forum link lists about this topic:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=192622&SiteID=1

https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1287189&SiteID=1

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=348662&SiteID=1

http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=1334187&SiteID=17

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1292357&SiteID=1

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=136253&SiteID=1

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=322792&SiteID=1

https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=763875&SiteID=1

The various causes fall into five categories:

1 Incorrect connection string, such as using SqlExpress.

2 NP was not enabled on the SQL instance.

3 Remote connection was not enabled.

4 Server not started, or point to not a real server in your connection string.

5 Other reasons such as incorrect security context.

Let’s go throught the detail one by one:

I.   Incorrect connection string, such as using SqlExpress.

Check out:

http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=558456&SiteID=17

https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1245564&SiteID=1

The typical error when dealing with Express includes:

a.  User is not aware of SqlExpress was installed as a named instance, consequently, in his/her connection string, he/she only specify «.»,»localhost» etc instead of «.SqlExpress» or «<machinename>Sqlexpress».

b. Np was disabld by default after installing SqlExpress.

c. If Sqlexpress was installed on the remote box, you need to enable remote connection for Express.

Please read the following blog for best practice of connecting to SqlExpress.

http://blogs.msdn.com/sql_protocols/archive/2006/03/23/558651.aspx

II. NP was not enabled on the SQL instance.

Check out:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=136253&SiteID=1

Oppose to SQL 2000 which turn on all protocols, SQL 2005 SKUs turn off NP by default. So, when you see this error, please check:

1) Go to SQL Server Configuration Manager, See Server has NP enabled.

2) %windir%program filesmicrosoft sql servermssql.1mssqllog, notepad ERRORLOG, see whether Server is listening on NP.  You should see «Server named pipe provider is ready to accept connection on [

.pipesqlquery

] or [.pipemssql$<InstanceName>sqlquery]»

3) Notice that «sqlquery» is the default pipe name, so you need to know server is listening on which pipe name. eg: if you specify server pipe name is «sqlquery1», then you would see in the errorlog that server listening on [

.pipesqlquery1

], and go to SQL Server Configuration Manager, click client Named Pipe properties, see whether the pipe name is same with the one server listening on.

4) If you are using SQL Native Client ODBC/OLEDB provider({SQL Native Client} or SQLNCLI), go to SQL Configuration Manager, click client protocols, make sure NP and TCP are both enabled. Right click properties of NP, make sure client is using the same pipe name as server for connection.

5) If you are using MDAC ODBC/OLEDB({SQL Server} or SQLOLEDB) provider, in command line, launch «cliconfg.exe» and make sure NP enabled and right pipe name specified.

III. Remote connection was not enabled.

Check out:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=322792&SiteID=1

https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=763875&SiteID=1

If you are making a remote connection, namely, your target SQL Server is on the different box as client application, you might need to check whether:

a. «File and Printer Sharing» was opened in Firewall exception list.

b. Please see the blog for enabling remote connection for express and troubleshooting tips of remote connection.

http://blogs.msdn.com/sql_protocols/archive/2005/11/14/492616.aspx

http://blogs.msdn.com/sql_protocols/archive/2006/09/30/SQL-Server-2005-Remote-Connectivity-Issu…

IV. Server not started, or point to not a real server in your connection string.

Check out:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=348662&SiteID=1

a. use «sc query mssqlserver» for default instance or «sc query mssql$<instancename>» to make sure SQL Server was started. Sometimes, reseason behind the broken of your client application w/ this error:40 might be SQL server restarted and failed, so, it’d better for you to double check.

b. User specified wrong server in their connection string, as described in the forum discussion, «MSSQLSERVER» is an invalid instance name. Remember, when you connect to default instance, <machinename> could be best representitive for the instance, when you connect to a named instance such as sqlexpress, you should specify <machinename><instancename> as data source in your connection string.

V. Other reasons such as incorrect security context.

Check out:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=192622&SiteID=1

Such error also occured during user operation such as moving database or db mirroring or cluster, any DB OP that might invovle different sql instances, namely, the destination database is located in another sql instance and user is not aware of the state of the destination. I recommend you first isolate whether this fail is during connection stage or data operation stage.

a. During data operation, you are normally asked to type in the destination server name whether it is default to «(local)» or another server «<remotemachinename>». So, remember the exact string that represent the target instance, then when the error repros, open command line, use «sqlcmd -S<representitive> -E» ,see what happens, if the connection fail, please follow up above I — IV troubleshooting lists. otherwise continue.

b. If you can make basic conection, but still face the error, then there must be something that server reject the connection or client close the connection for some reason.

Summary, give checklist:

1. Is your target server started?

2. Is your target server listening on NP? Which Pipe?

3. Has your client enabled NP? Use the same pipe to connect as Server?

4. Are you making local connection? If so, what is the instance, default or remote?

5. Did you put correct instance name in the connection string? Remember, Sqlexpress is a named instance.

6. Did you enable remote connection? Firewall? IPSec? «File and Printer Sharing» opened? Can access server?

7. Can you make basic connection by using <servername> or <servername><instancename>? Use sqlcmd or osql.

8. What is your repro step? What was your client APP doing during this error occuring? Which DB operation, detail?

MING LU

SQL Server Protocols

Disclaimer: This posting is provided «AS IS» with no warranties, and confers no rights

Sql server разрешены удаленные соединения provider named pipes provider error 40

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Answered by:

Question

I’m encountering an issue with «Named Pipes Provider, error: 40 windows» and am having problems determining how to fix it due to the environment I’m using. I have two SQL Servers installed on two separate Win2K3 Server boxes, one is SQL Server 2000 and the other is SQL Server 2005. The SQL Server 2000 contains the actual application data. The 2005 database is used only for Reporting Services. I’ve set up the reports on SSRS such that their datasources hit the 2000 server. This is using SQL Server authentication.

When testing the reports via SSRS (in Visual Studio 2005), the connection to the data works and the reports are generated fine. When I deploy them to the reporting server and launch IE to test locally (still on the 2005 box), I get this «Named Pipes Provider, error 40» issue. I made sure that Named Pipes and TCP were enabled and the port set at 1433 (to match that on the 2000 box).

Now I changed the datasource’s authentication from SQL Server to Windows authentication. I tested this in SSRS and this works too. When I redeployed the reports with this authentication change, testing the reports via IE locally (on the 2005 box) worked. Great. Now when I open IE on an external box, i.e. on the 2000 box, and try to test the reports, I get this same error 40 issue. I’ve been through a few threads describing the error 40, fiddling around with the SQL Server configuration as well as SSRS, to no avail. I have a feeling this error 40 issue has to due with permissions/authentication between the SQL Server boxes but I can’t really be sure. Anyone have any ideas on how to troubleshoot my situation. Thanks.

Answers

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

I. Incorrect connection string, such as using SqlExpress.

The typical error when dealing with Express includes:

a. User is not aware of SqlExpress was installed as a named instance, consequently, in his/her connection string, he/she only specify «.»,»localhost» etc instead of «.SqlExpress» or » Sqlexpress».

b. Np was disabld by default after installing SqlExpress.

c. If Sqlexpress was installed on the remote box, you need to enable remote connection for Express.

Please read the following blog for best practice of connecting to SqlExpress.

II. Named Pipes(NP) was not enabled on the SQL instance.

Oppose to SQL 2000 which turn on all protocols, SQL 2005 SKUs turn off NP by default. So, when you see this error, please check:

1) Go to SQL Server Configuration Manager, See Server has NP enabled.

2) %windir%program filesmicrosoft sql servermssql.1mssqllog, notepad ERRORLOG, see whether Server is listening on NP. You should see «Server named pipe provider is ready to accept connection on [ \.pipesqlquery ] or [\.pipemssql$ sqlquery]»

3) Notice that «sqlquery» is the default pipe name, so you need to know server is listening on which pipe name. eg: if you specify server pipe name is «sqlquery1», then you would see in the errorlog that server listening on [ \.pipesqlquery1 ], and go to SQL Server Configuration Manager, click client Named Pipe properties, see whether the pipe name is same with the one server listening on.

4) If you are using SQL Native Client ODBC/OLEDB provider( or SQLNCLI), go to SQL Configuration Manager, click client protocols, make sure NP and TCP are both enabled. Right click properties of NP, make sure client is using the same pipe name as server for connection.

5) If you are using MDAC ODBC/OLEDB( or SQLOLEDB) provider, in command line, launch «cliconfg.exe» and make sure NP enabled and right pipe name specified.

III. Remote connection was not enabled.

Check out: when you right click on the Server in SQL Server Management Studio, in Connections, the Remote server connections part, you have enabled the » Allow remote connections to this server » check box

If you are making a remote connection, namely, your target SQL Server is on the different box as client application, you might need to check whether:

a. «File and Printer Sharing» was opened in Firewall exception list.

b. Please see the blog for enabling remote connection for express and troubleshooting tips of remote connection.

IV. Server not started, or point to not a real server in your connection string.

Check out: Open SQL Server Surface Area Configuration and ensure all the required services are started, Remote Connections are configured.

a. use «sc query mssqlserver» for default instance or «sc query mssql$ » to make sure SQL Server was started. Sometimes, reseason behind the broken of your client application w/ this error:40 might be SQL server restarted and failed, so, it’d better for you to double check.

b. User specified wrong server in their connection string, as described in the forum discussion, «MSSQLSERVER» is an invalid instance name. Remember, when you connect to default instance, could be best representitive for the instance, when you connect to a named instance such as sqlexpress, you should specify as data source in your connection string.

V. Other reasons such as incorrect security context.

Such error also occured during user operation such as moving database or db mirroring or cluster, any DB OP that might invovle different sql instances, namely, the destination database is located in another sql instance and user is not aware of the state of the destination. I recommend you first isolate whether this fail is during connection stage or data operation stage.

a. During data operation, you are normally asked to type in the destination server name whether it is default to «(local)» or another server » «. So, remember the exact string that represent the target instance, then when the error repros, open command line, use «sqlcmd -S -E» ,see what happens, if the connection fail, please follow up above I — IV troubleshooting lists. otherwise continue.

b. If you can make basic conection, but still face the error, then there must be something that server reject the connection or client close the connection for some reason.

VI. Please try basic connectivity tests between the two mahcines you are working on. One simple way to verifty connectivity is to use command line tools, such as osql.exe. For example, osql -E -Stcp ervernameinstancename. If it connects cross-machine successfully, please also verify that your connection string in your scenario is correct.

Here are some blogs which could be helpful: just follow the basic connectivity troubleshooting guidelines on the SQL Protocols blog, see:

SQL Server 2005 Connectivity Issue Troubleshoot — Part I

SQL Server 2005 Connectivity Issue Troubleshoot — Part II

Источник

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

Troubleshooting

Problem

Unable to save template after making changes.

Symptom

Error message when attempting to hit save:

Template [Document] failed to save in DR
.
Problem description
Clarity.10026 Template [Document] failed to save.

System.Data.SqlClient.SqlException A network-related or instance-
specific error occurred while establishing a connection to SQL Server.
The server was not found or was not accessible. Verify that the
instance name is correct and that SQL Server is configured to allow
remote connections. (provider: Named Pipes Provider, error: 40 — Could
not open a connection to SQL Server)

Cause

The cause for this issue is that the cube’s relational connection source is pointing to a relational database on a separate server environment.

Diagnosing The Problem

Reconfirm all connection/detail to ensure that both the relational database and olap cube connection strings are from the same server.

— Open up Analysis Services

— Select the database that is being used and expand

— Select Data Sources, and further expand.

— Select the datasource and right click and select properties.

— Examine the Connection String information to see if the relational database used is on the same server as Analysis Services.

Resolving The Problem

In this case, the issue lies in the connection string for the cube. Analysis Services was on one server and the corresponding relational database was on another. The customer forgot to repoint the database after moving the database from a production environment.

Edit the connection string to use the same server as the Analysis Service and this should correct the problem.

If the databases are required to be on separate servers, please refer to technote # 1583743

Источник

Sql server разрешены удаленные соединения provider named pipes provider error 40

This forum has migrated to Microsoft Q&A. Visit Microsoft Q&A to post new questions.

Answered by:

Question

I have a problem in the connection to SQL Server 2014

Description for my servers:

2 server SQL 2014 and related with cluster failover with IP 100.8.130.125

2 web server (IIS) and related with load network balancing with IP 100.8.130.250

1 web application deployed in the 2 web server and the web.config is configured with this connection string:

When I connect to this web application in the first time, it works normally, always when I display each web forms in this web application it works normally, but sometimes the connection is interrupted and this message is displayed :

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.(provider: Named Pipes Provider, error: 40 — Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2)

but when I press refresh (F5) it return working.

Please help me, because I am not understand what is this problem sometimes working normally and suddenly is interrupted .

Answers

1. To work around this issue (if possible and acceptable)

• Try increase the connection timeout.
• Provide proper retry logic in your application, for example, establish a fresh connection instead of retry directly, or increase the interval between reties.

2. To find our the root cause of the issue:

Based on your post and all the suggestions above and the troubleshooting you have taken, I’d suggest you to capture a network traffic by using either Fiddler or Network Monitor (https://www.microsoft.com/en-us/download/details.aspx?id=4865)

To do so, download the tool, and start a capture task, try repro the issue, and then stop the capture.

Maybe we can find some clues from the capture result that can help us to find out the root cause, however, this might require some experience, if you cannot determine your answer here or on your own, consider opening a support case with us. Visit this link to see the various support options that are available to better meet your needs: https://support.microsoft.com/en-us/gp/contactus81?Audience=Commercial&SegNo=3.

For your reference:

• Edited by SQL Team — MSFT Tuesday, February 2, 2016 2:40 PM
• Marked as answer by Lydia Zhang Microsoft contingent staff Tuesday, February 9, 2016 7:49 AM

Hello — Intermittent issues like this could be because of many reasons, some of these could be:

Connection Pool reset at IIS level or Temporary Network disruptions or SQL Server Instance genuinely unable to accept connection due to heavy load or may even be because of TCP settings.

Few things that you can do:

1. Set-up the ping between App servers and DB Server (Ping -t and then see if these ping results are consistent without drop

2. Engage your Windows support team & ask them to check TCP Chimney/ Offloading settings and disable them for time-being to see if that works out well for you

3. Check & ensure that overall health of SQL Server instance looks good such as CPU/ Memory utilization and Disk response time. You should also ensure that there are no large number of sessions having waits with large wait_duration

Good Luck!
Please Mark This As Answer if it solved your issue.
Please Vote This As Helpful if it helps to solve your issue

Thank you for replay

1- I check the ping from the Web server to SQL server for a long time and the ping work normally without rupture.

2- I try TCP Chimney in SQL Server owner (which in work)

It is disabled by default, but I put it enabled then I try, then I put it disabled and I try, the same error.

first: netsh int tcp set global chimney=enabled (then trying)

then: netsh int tcp set global chimney=disabled (then trying)

3- All servers are in health, because is newly installed and with big memory and capacity

For This there are some steps

1—Make sure your database engine is configured to accept remote connections:

• Select the instance that is having a problem > Database Engine > Remote Connections
• Enable local and remote connections
• Restart instance

2— You may need to create an exception on the firewall for the SQL Server instance and port you are using:

• Start > Run > Firewall.cpl
• Click on exceptions tab
• Add sqlservr.exe (typically located in C:Program Files (x86)Microsoft SQL ServerMSSQL.xMSSQLBin , check your installs for the actual folder path) and port (default is 1433 )
• Check your connection string as well

3— Check Sql services are runnng or not.

4— SQL Server Configuration

When two or more SQL Servers are connected across network they do all communication using TCP/IP. The default port of SQL Server installation is 1433. This port can be changed through SQL Server Configuration Manager. TCP/IP should be enabled for SQL Server to be connected.

• Go to All Programs >> Microsoft SQL Server 2008 >> Configuration Tools >> SQL Server Configuration Manager >> Select TCP/IP
• Right Click on TCP/IP >> Click on Enable

You must restart SQL Server Services for all the changes to take effect. Right click and go to menu properties to select location where default port of SQL Server can be changed..

— Please mark as answer if you mark as helpful..

Источник

Scenario :

When trying to connect to a database from a site the below error occurs:

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

Fix 1 :

Basic checks to be done for this error:

• Named pipe/TCP is enabled.

• Remote connections are allowed.

• Windows Firewall is off.

1.     Try to ping your own computer from another computer. 
2.     Try disabling firewall / antivirus to arrive at successful pinging.
3.     Under windows Firewall create an exception for port 1433 as follows:

Go to Control Panel -> Click on Windows Firewall -> Go to exception tab as shown below. 

    4.   Click on Add Port… and enter the port number and name.

    5.   Click on Add Program -> Add C:Program FilesMicrosoft SQL Server90Shared locationSQLBrowser.exe in exception list.

    6.     Click ok and save the changes. 

Fix 2 :

Go to control panel -> Open Local services window -> select MSSQLSERVER service and restart.

( Or )

Go to run -> services.msc -> right click on SQL Server name and select “Restart” as shown below:

Fix 3 :

Check for the backslash or forward slash usage with SERVER_NAME/INSTANCENAME.

Fix 4 :

1.     Consequently, the connection string must be as “.SqlExpress» or «<machinename>Sqlexpress«.
2.     Named Pipes may be disabled by default after installing SqlExpress.c. If Sqlexpress is installed with the remote machine, enable remote connection for Express.

Named Pipes :

Follow three a step process after installing SQL Serve r:

1.     Enable Named Pipes : Go to SQL Config Manager -> SQL Server Network Configuration -> Protocols -> Named Pipes -> Right-click -> Enable.
2.     Restart the server : SQL Config Manager -> SQL Server Services -> SQL Server (SQLEXPRESS) -> Right-click -> Restart.
3.     Use proper server and instance names 

Fix 5 :

Use SERVER\ INSTANCE NAME with double backslash to resolve the error.

Fix 6 :

1.     Open SQL Server Configuration Manager.
2.     Select SQL Server Services from right.
3.     Find your server and go to its properties (with right click)

Change log on method to Local System as shown below:

Fixes are applicable to the following versions of SQL Server:

• SQL Server 1.1 (16 bit)

• SQL Server 4.2A (16 bit)

• SQL Server 4.2B (16 bit)

• SQL Server 4.21a

• SQL Server 6.0

• SQL Server 6.5

• SQL Server 7.0

• SQL Server 7.0 OLAP Tools

• SQL Server 2000

• SQL Server 2000 64-bit Edition

• SQL Server 2005

• SQL Server 2008

• Azure SQL DB

• SQL Server 2008 R2

• SQL Server 2012

• SQL Server 2014

• SQL Server 2016

Related Error Tags :

• Resolving could not open a connection to SQL Server errors

• Could not open a connection to SQL Server 

• How to Fix named Pipes Provider Error 40

• provider: Named Pipes Provider, error: 40