[ArgumentNullException: Value cannot be null.
Parameter name: source]
System.Linq.Enumerable.OfType(IEnumerable source) +127
System.Data.Linq.SqlClient.QueryConverter.VisitContains(Expression sequence, Expression value) +333
System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +889
System.Data.Linq.SqlClient.QueryConverter.VisitExpression(Expression exp) +33
System.Data.Linq.SqlClient.QueryConverter.VisitWhere(Expression sequence, LambdaExpression predicate) +156
System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +889
System.Data.Linq.SqlClient.QueryConverter.VisitSelect(Expression sequence, LambdaExpression selector) +38
System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +889
System.Data.Linq.SqlClient.QueryConverter.VisitDistinct(Expression sequence) +26
System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +889
System.Data.Linq.SqlClient.QueryConverter.ConvertOuter(Expression node) +131
System.Data.Linq.SqlClient.SqlProvider.BuildQuery(Expression query, SqlNodeAnnotations annotations) +166
System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +162
System.Data.Linq.DataQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator() +55
System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +416
System.Linq.Enumerable.ToList(IEnumerable`1 source) +69
FlaktWoods.Falcon.Models.InstallationTypeItem.OnAvailability(Boolean& Handled, Dictionary`2 DataContext) in C:\DEV\FG\FALCON\FALCON_DEV\FlaktWoods.Falcon.Models\Configuration\InstallationTypeItem.cs:18
FlaktWoods.Falcon.Service.FalconDataService.SetConfigurationItemAvailability(FalconSelectionInformation si, String Instance, String ClassConfiguration) in C:\DEV\FG\FALCON\FALCON_DEV\FlaktWoods.Falcon.Service\FalconDataService.cs:4456
FlaktWoods.Falcon.WebUI.Controllers.DirectModeController.DirectMode(String category, String range) +7907
lambda_method(Closure , ControllerBase , Object[] ) +191
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +35
System.Web.Mvc.Async.<>c.<BeginInvokeSynchronousActionMethod>b__9_0(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +39
System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +70
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +42
System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__11_0() +72
System.Web.Mvc.Async.<>c__DisplayClass11_1.<InvokeActionMethodFilterAsynchronouslyRecursive>b__2() +387
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +42
System.Web.Mvc.Async.<>c__DisplayClass3_6.<BeginInvokeAction>b__3() +50
System.Web.Mvc.Async.<>c__DisplayClass3_1.<BeginInvokeAction>b__5(IAsyncResult asyncResult) +188
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
System.Web.Mvc.<>c.<BeginExecuteCore>b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) +26
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +68
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +39
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
System.Web.Mvc.<>c.<BeginProcessRequest>b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) +40
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +68
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +648
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +213
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +131
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