500 - InternalServerError

Error Details

Nancy.RequestExecutionException: Oh noes! ---> System.Data.Entity.Core.EntityException: The underlying provider failed on Open. ---> System.Data.SqlServerCe.SqlCeException: There is a file sharing violation. A different process might be using the file. [ C:\Users\arvuti\Documents\TPS.net\ETSÜ KV 29.10.22.sdf ]
   at System.Data.SqlServerCe.SqlCeConnection.Open(Boolean silent)
   at System.Data.SqlServerCe.SqlCeConnection.Open()
   at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext](TTarget target, Action`2 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)
   at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext)
   at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
   --- End of inner exception stack trace ---
   at System.Data.Entity.Core.EntityClient.EntityConnection.Open()
   at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection(Boolean shouldMonitorTransactions)
   at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
   at System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClass7.b__5()
   at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
   at System.Data.Entity.Core.Objects.DataClasses.EntityReference`1.Load(MergeOption mergeOption)
   at System.Data.Entity.Core.Objects.DataClasses.RelatedEnd.DeferredLoad()
   at System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.LoadProperty[TItem](TItem propertyValue, String relationshipName, String targetRoleName, Boolean mustBeNull, Object wrapperObject)
   at System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.<>c__DisplayClass7`2.b__2(TProxy proxy, TItem item)
   at System.Data.Entity.DynamicProxies.Participant_49733C240C83D3273CBECAC957A9F9EEFBFD96B1AB49DA0800FFB27DAE7B15CA.get_Couple()
   at RazorOutput.RazorView.Execute()
   at Nancy.ViewEngines.Razor.NancyRazorViewBase`1.ExecuteView(String body, IDictionary`2 sectionContents)
   at System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid3[T0,T1,T2](CallSite site, T0 arg0, T1 arg1, T2 arg2)
   at Nancy.ViewEngines.Razor.RazorViewEngine.<>c__DisplayClass2b.b__2a(Stream stream)
   at Nancy.Responses.MaterialisingResponse.PreExecute(NancyContext context)
   --- End of inner exception stack trace ---
   at Nancy.NancyEngine.InvokeOnErrorHook(NancyContext context, ErrorPipeline pipeline, Exception ex)