I am getting this error in my recently deployed MVC 4 web application, whenever I click a link that requires database access:
Object reference not set to an instance of an object.
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.NullReferenceException: Object reference not set to an instance of an object.
When I run the mvc app locally, through visual studio, connecting to these remote databases, I do not get this error, and the credentials are correct because when I "Connect to database" it logs in and retrieves all the entities as normal. I published the site to the server's FTP, as the host does not have a webdeploy service.
Can anyone explain why my deployed app would have issues with the database and not my local version?
UPDATE
Before I exposed this NullReferenceException, it was a ReflectionTypeLoadException. Don't know if that means anything, but here:
[ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.]
System.Reflection.RuntimeModule.GetTypes(RuntimeModule module) +0
System.Reflection.RuntimeModule.GetTypes() +4
System.Reflection.Assembly.GetTypes() +61
System.Data.Entity.ModelConfiguration.Mappers.TypeMapper.<.ctor>b_1(Assembly a) +11
System.Linq.d_142.MoveNext() +234
System.Collections.Generic.List1.InsertRange(Int32 index, IEnumerable1 collection) +392
System.Data.Entity.ModelConfiguration.Mappers.TypeMapper..ctor(MappingContext mappingContext) +258
System.Data.Entity.DbModelBuilder.MapTypes(EdmModel model) +114
System.Data.Entity.DbModelBuilder.Build(DbProviderManifest providerManifest, DbProviderInfo providerInfo) +112
System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection) +59
System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext) +62
System.Data.Entity.Internal.RetryLazy2.GetValue(TInput input) +123
System.Data.Entity.Internal.LazyInternalContext.InitializeContext() +461
System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +18
System.Data.Entity.Internal.Linq.InternalSet1.Initialize() +52
System.Data.Entity.Internal.Linq.InternalSet1.get_InternalContext() +15
System.Data.Entity.Infrastructure.DbQuery1.System.Linq.IQueryable.get_Provider() +37
System.Linq.Queryable.Select(IQueryable1 source, Expression1 selector) +66
ProOptInteractive.Controllers.ServiceController.Index() +115
lambda_method(Closure , ControllerBase , Object[] ) +35
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary2 parameters) +182
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 parameters) +27
System.Web.Mvc.Async.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41() +28
System.Web.Mvc.Async.<>c__DisplayClass81.b__7(IAsyncResult ) +10
System.Web.Mvc.Async.WrappedAsyncResult1.End() +50
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
System.Web.Mvc.Async.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33() +58
System.Web.Mvc.Async.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() +225
System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) +10
System.Web.Mvc.Async.WrappedAsyncResult1.End() +50
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
System.Web.Mvc.Async.<>c_DisplayClass2a.b_20() +24
System.Web.Mvc.Async.<>c_DisplayClass25.b_22(IAsyncResult asyncResult) +99
System.Web.Mvc.Async.WrappedAsyncResult1.End() +50
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +14
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
System.Web.Mvc.Async.WrappedAsyncResult1.End() +55
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +39
System.Web.Mvc.Async.<>c_DisplayClass4.b__3(IAsyncResult ar) +23
System.Web.Mvc.Async.WrappedAsyncResult1.End() +55
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +29
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +25
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
System.Web.Mvc.Async.WrappedAsyncResult1.End() +55
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +31
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9628700
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155
Update
Ok I just attempted to deploy a brand new MVC app from Visual Studio, and that gave me no errors when trying to access models (I made a simple Students model and created a new "Student" in the database, something that would not work in my actual MVC app. Any ideas?
