Server Error in '/' Application.

System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Exception: UmtPortal.Controller.SiteManagementController:GetSiteTree ---> System.Exception: 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)
umtweb ---> System.ComponentModel.Win32Exception: The network path was not found
  --- End of inner exception stack trace ---
  at UMT.Controller.Common.DataBase.OpenConnection(Boolean blnIsConnection)
  at UMT.Controller.Common.BaseController.get_Connection()
  at UMT.Controller.SiteManagmentController.SearchSites(Int32& intTotalRecords, String strPager, Nullable`1 intType, String strFilter, Nullable`1 blnActiveFlag, Boolean blnDeletedFlag, Nullable`1 intParentSiteIdRef)
  at UMT.Controller.SiteManagmentController.GetSiteTree(Nullable`1 blnActiveFlag, Boolean blnDeletedFlag, Int32 intParentSiteIdRef)
  --- End of inner exception stack trace ---
  at UMT.Controller.SiteManagmentController.GetSiteTree(Nullable`1 blnActiveFlag, Boolean blnDeletedFlag, Int32 intParentSiteIdRef)
  at UMT.api.umtService.GetChildSites(String strTokenKey, Int32 intParentSiteId)
  --- End of inner exception stack trace ---

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.Web.Services.Protocols.SoapException: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Exception: UmtPortal.Controller.SiteManagementController:GetSiteTree ---> System.Exception: 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)
umtweb ---> System.ComponentModel.Win32Exception: The network path was not found
  --- End of inner exception stack trace ---
  at UMT.Controller.Common.DataBase.OpenConnection(Boolean blnIsConnection)
  at UMT.Controller.Common.BaseController.get_Connection()
  at UMT.Controller.SiteManagmentController.SearchSites(Int32& intTotalRecords, String strPager, Nullable`1 intType, String strFilter, Nullable`1 blnActiveFlag, Boolean blnDeletedFlag, Nullable`1 intParentSiteIdRef)
  at UMT.Controller.SiteManagmentController.GetSiteTree(Nullable`1 blnActiveFlag, Boolean blnDeletedFlag, Int32 intParentSiteIdRef)
  --- End of inner exception stack trace ---
  at UMT.Controller.SiteManagmentController.GetSiteTree(Nullable`1 blnActiveFlag, Boolean blnDeletedFlag, Int32 intParentSiteIdRef)
  at UMT.api.umtService.GetChildSites(String strTokenKey, Int32 intParentSiteId)
  --- End of inner exception stack trace ---

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:


[SoapException: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Exception: UmtPortal.Controller.SiteManagementController:GetSiteTree ---> System.Exception: 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)
umtweb ---> System.ComponentModel.Win32Exception: The network path was not found
   --- End of inner exception stack trace ---
   at UMT.Controller.Common.DataBase.OpenConnection(Boolean blnIsConnection)
   at UMT.Controller.Common.BaseController.get_Connection()
   at UMT.Controller.SiteManagmentController.SearchSites(Int32& intTotalRecords, String strPager, Nullable`1 intType, String strFilter, Nullable`1 blnActiveFlag, Boolean blnDeletedFlag, Nullable`1 intParentSiteIdRef)
   at UMT.Controller.SiteManagmentController.GetSiteTree(Nullable`1 blnActiveFlag, Boolean blnDeletedFlag, Int32 intParentSiteIdRef)
   --- End of inner exception stack trace ---
   at UMT.Controller.SiteManagmentController.GetSiteTree(Nullable`1 blnActiveFlag, Boolean blnDeletedFlag, Int32 intParentSiteIdRef)
   at UMT.api.umtService.GetChildSites(String strTokenKey, Int32 intParentSiteId)
   --- End of inner exception stack trace ---]
   System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) +237812
   System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) +273
   UMT.Common.UMT.api.umtService.GetChildSites(String strTokenKey, Int32 intParentSiteId) +112
   UMT.Common.Utility.get_Sites() +55
   UMT.Common.RewriteModule.RewriteUrl(String strRawUrl) +482
   UMT.Common.RewriteModule.UrlRewriting(String strRawUrl) +544
   UMT.Common.RewriteModule.RewriteModule_BeginRequest(Object sender, EventArgs e) +73
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +142
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +93


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4676.0