SQLCE 4 - EF4.1 Internal error: Cannot open the shared memory region - sql

Question

Hi im trying to run my MVC 3 application running SQLCE 4 embedded and EF4.1
i have used the data access methods as described in this tutorial
This works perfectly locally(obviously), but when running it on my hosting i get the below error message. It is a shared hosting enviroment.
Is it an open connection that is the problem? Shouldn't it be handled by the unit of work class that is returning the dbcontext as a singleton throughout the whole application as mentioned in the tutorial?
Any tips on what this might be caused by would be appreciated
Internal error: Cannot open the shared memory region.
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.Data.SqlServerCe.SqlCeException: Internal
error: Cannot open the shared memory region.
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:
[SqlCeException (0x80004005): Internal error: Cannot open the shared memory region.]
System.Data.SqlServerCe.SqlCeConnection.ProcessResults(Int32 hr) +40
System.Data.SqlServerCe.SqlCeConnection.Open(Boolean silent) +2542
System.Data.SqlServerCe.SqlCeConnection.Open() +113
System.Data.EntityClient.EntityConnection.OpenStoreConnectionIf(Boolean openCondition, DbConnection storeConnectionToOpen, DbConnection originalConnection, String exceptionCode, String attemptedOperation, Boolean& closeStoreConnectionOnFailure) +67
[EntityException: The underlying provider failed on Open.]
System.Data.EntityClient.EntityConnection.OpenStoreConnectionIf(Boolean openCondition, DbConnection storeConnectionToOpen, DbConnection originalConnection, String exceptionCode, String attemptedOperation, Boolean& closeStoreConnectionOnFailure) [phone]
System.Data.EntityClient.EntityConnection.Open() +142
System.Data.Objects.ObjectContext.EnsureConnection() +97
System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) +66
System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator() +47
System.Linq.Enumerable.FirstOrDefault(IEnumerable`1 source) +220
System.Linq.Queryable.FirstOrDefault(IQueryable`1 source) +383
System.Data.Entity.Internal.InternalContext.QueryForModelHash() +349
System.Data.Entity.Internal.InternalContext.CompatibleWithModel(Boolean throwIfNoMetadata) +109
System.Data.Entity.CreateDatabaseIfNotExists`1.InitializeDatabase(TContext context) +373
System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +64
[DataException: An exception occurred while initializing the database. See the InnerException for details.]
System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +152
System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +199
System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input) +193
System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action) +235
System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +38
System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +89
System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext() +21
System.Data.Entity.Internal.Linq.InternalSet`1.Find(Object[] keyValues) +37
Web.Infrastructure.DataAccess.Repository`1.GetByID(Object id) +131
Web.Controllers.PagesController.Home() +154
lambda_method(Closure , ControllerBase , Object[] ) +79
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +264
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +39
System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +129
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +784922
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +314
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +784976
System.Web.Mvc.Controller.ExecuteCore() +159
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +335
System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +62
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +20
System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +54
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +453
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +371

Answer 1

This error indicates that the SQL Server Compact database file is located on a shared folder, not a local drive. That will not work.