I am trying to get the Demo provided in expand framework source to work located in "Xpand-Source-17.1.3.6\Demos\Middle Tier\E4035-Remoting" to work out of the box but i get the exception below.Specifically i want to use the model difference in a remoting scenario.
Object reference not set to an instance of an object.
Server stack trace: at DevExpress.ExpressApp.Security.SecurityStrategy.GetObjectSpaces() at DevExpress.ExpressApp.Security.SecurityStrategy.RegisterProcessors(Dictionary`2 processors, Object permissionsProvider, IObjectSpace objectSpace) at DevExpress.ExpressApp.Security.SecurityStrategy.CreateSelectDataSecurityCore(IObjectSpace objectSpace) at DevExpress.ExpressApp.Security.SecurityStrategy.CreateSelectDataSecurity(IObjectSpace objectSpace) at DevExpress.ExpressApp.Security.ClientServer.SecuredSerializableObjectLayer.CreateSerializableObjectLayerCore(IClientInfo clientInfo, IDataLayer dataLayer, IRequestSecurityStrategyProvider securityStrategyProvider, UnitOfWork& result_parentSession, ISecurityRule& securityRule, Boolean allowICommandChannelDoWithSecurityContext) at DevExpress.ExpressApp.Security.ClientServer.SecuredSerializableObjectLayer.GetSerializableObjectLayer(IClientInfo clientInfo, UnitOfWork& result_parentSession) at DevExpress.ExpressApp.Security.ClientServer.SecuredSerializableObjectLayerBase.DevExpress.ExpressApp.Security.ClientServer.ISecuredSerializableObjectLayer.LoadObjects(IClientInfo clientInfo, XPDictionaryStub dictionary, ObjectStubsQuery[] queries) at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at DevExpress.ExpressApp.Security.ClientServer.ISecuredSerializableObjectLayer.LoadObjects(IClientInfo clientInfo, XPDictionaryStub dictionary, ObjectStubsQuery[] queries)
at DevExpress.Xpo.SerializableObjectLayerClient.LoadObjects(Session session, ObjectsQuery[] queries)
at DevExpress.Xpo.Logger.LogManager.Log[T](String category, LogHandler1 handler, MessageHandler1 createMessageHandler)
at DevExpress.Xpo.Session.GetObjects(ObjectsQuery query)
at DevExpress.Xpo.Session.GetObjects(XPClassInfo classInfo, CriteriaOperator criteria, SortingCollection sorting, Int32 topSelectedRecords, Boolean selectDeleted, Boolean force)
at DevExpress.Xpo.Helpers.XPObjectTypesManager.GetAllTypes()
at DevExpress.Xpo.Session.<>c__DisplayClass3a.b__38()
at DevExpress.Xpo.Logger.LogManager.Log[T](String category, LogHandler1 handler, MessageHandler1 createMessageHandler)
at DevExpress.Xpo.Session.GetObjectByKey(Type classType, Object id)
at DevExpress.ExpressApp.Xpo.XPObjectSpace.GetObjectByKey(Type objectType, Object key)
at DevExpress.ExpressApp.Security.ClientServer.ServerSecurityClient.get_User()
at Xpand.ExpressApp.ModelDifference.DataStore.Queries.QueryUserModelDifferenceObject.get_UsersContainsOperator()
at Xpand.ExpressApp.ModelDifference.DataStore.Queries.QueryUserModelDifferenceObject.GetActiveModelDifferences(String applicationName, String name, DeviceCategory deviceCategory)
at Xpand.ExpressApp.ModelDifference.DictionaryStores.XpoUserModelDictionaryDifferenceStore.GetActiveDifferenceObjects(DeviceCategory deviceCategory)
at Xpand.ExpressApp.ModelDifference.DictionaryStores.XpoUserModelDictionaryDifferenceStore.LoadCore(ModelApplicationBase userDiff)
at DevExpress.ExpressApp.ApplicationModelManager.CreateLayerByStore(String id, ModelStoreBase store)
at DevExpress.ExpressApp.XafApplication.LoadUserDifferences()
at DevExpress.ExpressApp.XafApplication.Logon(PopupWindowShowActionExecuteEventArgs logonWindowArgs)
at DevExpress.ExpressApp.Win.WinApplication.Logon(PopupWindowShowActionExecuteEventArgs logonWindowArgs)
