The system cannot find the file specified

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I saw many questions on SO with this error  But none were related to forms  I just hosted my application server after testing locally  I think it worked for a few mins but I m not sure as I may have looked at the localhost tab for a moment  Then it stopped working  I may have changed something as I was making changes on server too    I checked my connection string and also tried logging into the DB using other ways and it is online  So  any clues what could be wrong  I don t think it is possible that sql server is only not responding to requests from an app and is available if you log in through SSMS   Below is the error I get      Server Error in     Application       The system cannot find the file specified      Description  An unhandled exception occurred during the execution of   the current web request  Please review the stack trace for more   information about the error and where it originated in the code        Exception Details  System ComponentModel Win32Exception  The system   cannot find the file specified      Source Error        An unhandled exception was generated during the execution of the   current web request  Information regarding the origin and location of   the exception can be identified using the exception stack trace below       Stack Trace         Win32Exception  0x80004005   The system cannot find the file   specified        SqlException  0x80131904   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  SQL Network Interfaces  error  52 - Unable to   locate a Local Database Runtime installation  Verify that SQL Server   Express is properly installed and that the Local Database Runtime   feature is enabled      System Data SqlClient SqlInternalConnection OnError SqlException   exception  Boolean breakConnection  Action1 wrapCloseInAction     5296071    System Data SqlClient TdsParser ThrowExceptionAndWarning TdsParserStateObject   stateObj  Boolean callerHasConnectionLock  Boolean asyncClose   558   System Data SqlClient TdsParser Connect ServerInfo serverInfo    SqlInternalConnectionTds connHandler  Boolean ignoreSniOpenTimeout    Int64 timerExpire  Boolean encrypt  Boolean trustServerCert  Boolean   integratedSecurity  Boolean withFailover   5308555   System Data SqlClient SqlInternalConnectionTds AttemptOneLogin ServerInfo   serverInfo  String newPassword  SecureString newSecurePassword    Boolean ignoreSniOpenTimeout  TimeoutTimer timeout  Boolean   withFailover   145   System Data SqlClient SqlInternalConnectionTds LoginNoFailover ServerInfo   serverInfo  String newPassword  SecureString newSecurePassword    Boolean redirectedUserInstance  SqlConnectionString connectionOptions    SqlCredential credential  TimeoutTimer timeout   920   System Data SqlClient SqlInternalConnectionTds OpenLoginEnlist TimeoutTimer   timeout  SqlConnectionString connectionOptions  SqlCredential   credential  String newPassword  SecureString newSecurePassword    Boolean redirectedUserInstance   307   System Data SqlClient SqlInternalConnectionTds  ctor DbConnectionPoolIdentity   identity  SqlConnectionString connectionOptions  SqlCredential   credential  Object providerInfo  String newPassword  SecureString   newSecurePassword  Boolean redirectedUserInstance  SqlConnectionString   userConnectionOptions   434   System Data SqlClient SqlConnectionFactory CreateConnection DbConnectionOptions   options  DbConnectionPoolKey poolKey  Object poolGroupProviderInfo    DbConnectionPool pool  DbConnection owningConnection    DbConnectionOptions userOptions   225   System Data ProviderBase DbConnectionFactory CreatePooledConnection DbConnectionPool   pool  DbConnectionOptions options  DbConnectionPoolKey poolKey    DbConnectionOptions userOptions   37   System Data ProviderBase DbConnectionPool CreateObject DbConnectionOptions   userOptions   558   System Data ProviderBase DbConnectionPool UserCreateRequest DbConnectionOptions   userOptions   67   System Data ProviderBase DbConnectionPool TryGetConnection DbConnection   owningObject  UInt32 waitForMultipleObjectsTimeout  Boolean   allowCreate  Boolean onlyOneCheckConnection  DbConnectionOptions   userOptions  DbConnectionInternal amp  connection   1052   System Data ProviderBase DbConnectionPool TryGetConnection DbConnection   owningObject  TaskCompletionSource1 retry  DbConnectionOptions   userOptions  DbConnectionInternal amp  connection   78   System Data ProviderBase DbConnectionFactory TryGetConnection DbConnection   owningConnection  TaskCompletionSource1 retry  DbConnectionOptions   userOptions  DbConnectionInternal amp  connection   167   System Data ProviderBase DbConnectionClosed TryOpenConnection DbConnection   outerConnection  DbConnectionFactory connectionFactory    TaskCompletionSource1 retry  DbConnectionOptions userOptions   143   System Data SqlClient SqlConnection TryOpen TaskCompletionSource1   retry   83    System Data SqlClient SqlConnection Open    96   System Data SqlClient SqlProviderServices UsingConnection SqlConnection   sqlConnection  Action1 act   79   System Data SqlClient SqlProviderServices UsingMasterConnection SqlConnection   sqlConnection  Action 1 act   384   System Data SqlClient SqlProviderServices GetDbProviderManifestToken DbConnection   connection   241   System Data Common DbProviderServices GetProviderManifestToken DbConnection   connection   26       ProviderIncompatibleException  The provider did not return a   ProviderManifestToken string     System Data Common DbProviderServices GetProviderManifestToken DbConnection   connection   170   System Web Providers ModelHelper GetStorageMetadata String   providerName  DbConnection connection  String ssdl   35   System Web Providers ModelHelper CreateMetadataWorkspace String   providerName  DbConnection connection  String csdl  String ssdl    String msl   154   System Web Providers ModelHelper CreateEntityConnection ConnectionStringSettings   setting  String csdl  String ssdl  String msl   109   System Web Providers ModelHelper CreateMembershipEntities ConnectionStringSettings   setting   28   System Web Providers DefaultMembershipProvider GetPasswordWithFormat String   userName  Boolean updateLastLoginActivityDate  Int32 amp  status  String amp    password  Int32 amp  format  String amp  salt  Int32 amp    failedPasswordAttemptCount  Int32 amp  failedPasswordAnswerAttemptCount    Boolean amp  isApproved  DateTime amp  lastLoginDate  DateTime amp    lastActivityDate   118   System Web Providers DefaultMembershipProvider CheckPassword String   userName  String password  Boolean updateLastActivityDate  Boolean   failIfNotApproved  String amp  salt  Int32 amp  passwordFormat   81   System Web Providers DefaultMembershipProvider ValidateUser String   username  String password   105   System Web Security Membership ValidateUser String username  String   password   26    Staff Web Account Login OnAuthenticate Object sender    AuthenticateEventArgs e  in   c  Assembla SVN servicesdue Staff Web Staff Web Account Login aspx cs 28   System Web UI WebControls Login OnAuthenticate AuthenticateEventArgs   e   9449786    System Web UI WebControls Login AttemptLogin    119   System Web UI WebControls Login OnBubbleEvent Object source  EventArgs   e   75    System Web UI Control RaiseBubbleEvent Object source    EventArgs args   37   System Web UI WebControls Button OnCommand CommandEventArgs e   114   System Web UI WebControls Button RaisePostBackEvent String   eventArgument   159   System Web UI WebControls Button System Web UI IPostBackEventHandler RaisePostBackEvent String   eventArgument   10   System Web UI Page RaisePostBackEvent IPostBackEventHandler   sourceControl  String eventArgument   13   System Web UI Page RaisePostBackEvent NameValueCollection postData     35    System Web UI Page ProcessRequestMain Boolean includeStagesBeforeAsyncPoint  Boolean includeStagesAfterAsyncPoint     1724      Version Information  Microsoft  NET Framework Version 4 0 30319    ASP NET Version 4 0 30319 18055   Someone also had this error and they said they were using the wrong store to connect to DB and hence the error  I only have one store in my code  There is no other    Update    I found the problem  It is membership related  Something is not right with my membership connection string  But I don t know what  My app requires registration so authentication is enabled  I left the default settings alone  Also published the mdf file in the App Data folder   There is a similar question here  Deploying ASP NET membership to Godaddy  But the solution is not clear and the answer is marked  I added the       to the connection string and I see the error     The connection name  LocalSqlServer  was not found in the applications   configuration or the connection string is empty    So  what should I do  This membership is working flawlessly locally   Update   I also tried what this one suggests Godaddy ASP NET membership database woes  I removed the conn string and added with the name  LocalSqlServer  to make Godaddy happy  Then I removed and added the following with this connectionStringName - DefaultProfileProvider  DefaultMembershipProvider  DefaultRoleProvider and DefaultSessionProvider  Still get the same error of system cannot find the specified file

User · Answer

I had the same problem - for me it was the SQL Server running out of memory  Freeing up some memory solved the issue

User · Answer

If you encounter this error in GoDaddy after deploying a  Net MVC web application  And your web config is absolutely correct    Right click your data project select settings and make sure that the correct connection strings to the GoDaddy server is in use

User · Answer

I got same error after publish my project to my physical server  My web application works perfectly on my computer when I compile on VS2013  When I checked connection string on sql server manager  everything works perfect on server too  I also checked firewall  I switched it off   But still didn t work  I remotely try to connect database by SQL Manager with exactly same user pass and instance name etc with protocol pipe tcp and I saw that everything working normally  But when I try to open website I m getting this error  Is there anyone know 4th option for fix this problem    NOTE  My App  ASP NET 4 5  by VS2013   Server  Windows 2008 R2 64bit  SQL  MS-SQL WEB 2012 SP1  Also other web applications works great at web browsers with their database on same server      After one day suffering I found the solution of my issue   First I checked all the logs and other details but i could find nothing  Suddenly I recognize that  when I try to use connection string which is connecting directly to published DB and run application on my computer by VS2013  I saw that it s connecting another database file  I checked local directories and I found it  ASP NET Identity not using my connection string as I wrote in web config file  And because of this VS2013 is creating or connecting a new database with the name  DefaultConnection mdf  in App Data folder  Then I found the solution  it was in IdentityModel cs   I changed code as this    public class ApplicationUser   IdentityUser      public class ApplicationDbContext   IdentityDbContext lt ApplicationUser gt          public ApplicationDbContext     base  DefaultConnection   --- gt  this was original     public ApplicationDbContext     base   lt myConnectionStringNameInWebConfigFile gt      -- gt  changed                 So  after all  I re-builded and published my project and everything works fine now

User · Answer

I got this error when starting my ASP NET application and in my case the problem was that the SQL Server service was not running  Starting that cleared it up

User · Answer

I had this error and I found that the name of one of my connection strings was wrong  Check the names as well as the actual string

User · Answer

The most common reason could be the database connection string  You have to change the connection string attachDBFile  DataDirectory file name mdf  there might be problem in host name which would be  local  localhost or   sqlexpress

User · Answer

A network-related or instance-specific error occurred while establishing a connection to SQL Server  The server was not found or was not accessible  text  Generally issues like this are related to any of the following need to be looked at    firewall settings from the web server to the database server connection string errors enable the appropriate protocol pipes  tcp-ip   Try connecting to sql server with sql management server on the system that sql server is installed on and work from there  Pay attention to information in the errorlogs

User · Answer

start the sql server agent  that should fix your problem

User · Answer

Server Error in     Application       The system cannot find the file specified      Description  An unhandled exception occurred during the execution of   the current web request  Please review the stack trace for more   information about the error and where it originated in the code        Exception Details  System ComponentModel Win32Exception  The system   cannot find the file specified      Source Error                             SqlCommand cmd   new SqlCommand  select   from tblemployee  con                      con Open                       GridView1 DataSource   cmd ExecuteReader                       GridView1 DataBind          Source File  d  C    programs kudvenkat adobasics1 adobasics1 employeedata aspx cs    Line    23   if your error is same like mine  just do this  right click on your table in sqlserver object explorer choose properties in lower left corner in general option there is a connection block with server and connection specification in your web config for datasource   or local choose name specified in server in properties

User · Answer

Considering that a LocalDb instance only intended for use in development  LocalDb is not available for production servers When you deploy the final result   I think your connection string is pointing to a LocalDb instance and you need to take certain steps to turn it into the SQL Server database  It s not just a matter of copying an mdf file either  It will possibly differ from one hosting company to another  but typically  you need to create a backup of your existing database  a  bak file  and then restore that to the hosting company s SQL Server  You should ask them where you can find instructions on deploying your database into production

[asp.net] "The system cannot find the file specified"

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