Autocount Error Locating Server Instance Specified
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Error 26 Error Locating Server Instance Specified
more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack sql server network interfaces error locating server instance specified Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, sql server network interfaces error locating server instance specified xffffffff helping each other. Join them; it only takes a minute: Sign up How to solve Error 26: Error Locating Server/Instance Specified in production environment? up vote 8 down vote favorite 1 I have a strange error in production environment BUT not in develop environment. In my develop environment, with Visual studio 2010, i can connect without problem
Sql Network Interfaces Error 26 - Error Locating Server/instance Specified Solution
to Sql Server 2012. When i copy my Windows Form app to others PC in the same network, i get an "Error 26:Error Locating Server/Instance Specified". The same application worked good with an old database instance with Sql Server 2008. I don't know what to check and where to start! EDIT: Another strange behavior is that it works good if i use a code like this conn.Open() dr = cmd.ExecuteReader() But stop to work if i open a form with a datagridview, a dataset and a BindingSource ! .net sql-server-2012 share|improve this question edited Nov 12 '12 at 9:03 asked Nov 12 '12 at 8:40 stighy 2,3371161115 How about the connection string? Are you referencing localhost or . as the host name? –J. Steen Nov 12 '12 at 8:44 This is my connection string : Data Source=192.168.x.y;Initial Catalog=dbname;User id=username;Password=password –stighy Nov 12 '12 at 8:58 Did you check that the sql server can take connections from other computers? –linkerro Nov 12 '12 at
★★★★★★★★★★★★★★★ SQL Server ConnectivityMay 13, 2007286 0 0 0 Users often see this error message when connection to a SQL Server and don't know where to start to solve the problem. In most forums, people error locating server/instance specified sql server 2014 says this is because remote connection is not enabled on the server. This is not error 26 error locating server instance specified visual studio 2010 exactly correct. Actually, this error message give customers very specific information and the solution is quite simple. First of all, you get
Error 26 In Sql Server 2014
this error message only if you are trying to connect to a SQL Server named instance. For default instance, you never see this. Why? Because even if we failed at this stage (i.e. error locating server/instance specified), http://stackoverflow.com/questions/13340531/how-to-solve-error-26-error-locating-server-instance-specified-in-production-en we will continue to try connect using default values, e.g defaul TCP port 1433, default pipe name for Named Pipes. You may see other error message due to failure later, but not this error message. Every time client makes a connection to SQL Server named instance, we will send a SSRP UDP packet to the server machine UDP port 1434. We need this step to know configuration information of the SQL instance, e.g., https://blogs.msdn.microsoft.com/sql_protocols/2007/05/13/sql-network-interfaces-error-26-error-locating-serverinstance-specified/ protocols enabled, TCP port, pipe name etc. Without these information, client does know how to connect the server and it fails with this specified error message. In a word, the reason that we get this error message is the client stack could not receive SSRP response UDP packet from SQL Browser. It's easy to isolate the issue. Here are the steps:1) Make sure your server name is correct, e.g., no typo on the name. 2) Make sure your instance name is correct and there is actually such an instance on your target machine. [Update: Some application converts \ to . If you are not sure about your application, please try both ServerInstance and Server\Instance in your connection string]3) Make sure the server machineis reachable, e.g, DNS can be resolve correctly, you are able to ping the server (not always true). 4) Make sure SQL Browser service is running on the server.5) If firewall is enabled on the server, you need to put sqlbrowser.exe and/or UDP port 1434 into exception. Once you are done the steps, you should not see this error message anymore. You may still fail to connect your SQL server, but error message should be different and you have a different issue now. [Update: If it still fails, you may replace serverinstance with tcp:serverinstance and/or np:serverinstance
started.•The user has keyed in a wrong Server Name (computer name or IP address)•The use has input an invalid SQL Instance name (A2006 or the port number)•The IP Address of the Server has been changed•It was blocked by Firewall To solve connection problem: ?Try to connect http://www.autocountsoft.com/products/ac_accounting/helpfile/connection_problem.htm using IP address and SQL Port NumberEg. 192.168.0.1, 1433 When connecting to SQL Server, 2 elements are needed: the Server, and the Instance. You may specify the Server by using its Computer Name (such as: Peter-PC) or its IP Address http://www.niteshluharuka.com/solution-error-26-error-locating-serverinstance-specified/ (such as: 192.168.0.1). Basically, IP Address is more straight forward and accurate than Computer Name. You may specify the Instance by using its Instance Name (such as: A2006) or its Port Number (such as: 1433) So there are 4 combinations to define error locating the connection: (a) IP Address + Port Number The format is
SQL (be it any version of SQL) and we always spend some time to figure out the exact issue. Every time we need to look int where should we start looking for the problem. This post lists the basic issues that can cause this error and I will keep this post updated in case any more reasons are found. Below are the most common issues due to which we get this error Check the Server name - First and the most common thing to check is to ensure there are no typo errors for the server name. Accessibility to Server - The server should also be accessible from the network computer, we are trying to access SQL Server. Check the Instance name - Once the server is checked for correctness, the next thing to check is the SQL Server instance name. Check for typo errors in the Instance name and also ensure that the Instance exists on the server Remote Connections enabled on SQL Server - Ensure SQL Server is allowed for remote connections Mixed Mode Authentication Enabled - Ensure Mixed-mode authentication is enabled on SQL Server you are trying to connect to SQL Browser Service should be running - On the server, SQL browser service should be running. You can check this from Services window on the server. Firewall is configured on server to allow sqlbrowser.exe and port 1434 under exception. After following all the above steps, the error should be resolved. [Original Source] Hope you like this post. You can get connected with me on Facebook, Twitter or LinkedIn also. In case you know any other way of resolving the feature, let me know via comments. Share this to support us :Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Twitter (Opens in new window)Click to email this to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Google+ (Opens in new window)MoreClick to share on Tumblr (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pinterest (Opens in new window) Related #SQL#SQL Server#Tips#Troubleshooting « Previous Post