尝试在MS CRM中实施虚拟实体时发生错误-发生OData错误

Question

我正在尝试在CRM Online V9.1.0.5220中实现虚拟实体。我已经创建了自定义ODATA服务，以下是屏幕截图-

我在CRM中创建了银行虚拟实体，当我尝试调用该虚拟实体时，出现以下错误：“无法从数据源检索实体。请重试或与系统管理员联系。'

当我尝试从浏览器中以/api/data/v9.1/geo_banks调用虚拟实体时，出现错误-

{
"error": {
    "code": "0x80050263",
    "message": "An OData error occurred.",
    "innererror": {
        "message": "An OData error occurred.",
        "type": "System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=9.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]",
        "stacktrace": "   at Microsoft.Crm.Extensibility.OrganizationSdkServiceInternal.RetrieveMultiple(QueryBase query, InvocationContext invocationContext, CallerOriginToken callerOriginToken, WebServiceType serviceType, Boolean checkAdminMode, Guid appModuleId, Dictionary`2 optionalParameters)\r\n   at Microsoft.Crm.Extensibility.OData.CrmODataExecutionContext.RetrieveMultiple(QueryBase query)\r\n   at Microsoft.Crm.Extensibility.OData.CrmODataServiceDataProvider.RetrieveEdmEntityCollection(CrmODataExecutionContext context, String entityCollectionName, String castedEntityName, ODataQueryOptions queryOptions)\r\n   at Microsoft.Crm.Extensibility.OData.EntityController.<>c__DisplayClass35_0.<GetEntitySetInternal>b__1()\r\n   at Microsoft.PowerApps.CoreFramework.ActivityLoggerExtensions.Execute(ILogger logger, EventId eventId, ActivityType activityType, Action action, IEnumerable`1 additionalCustomProperties)\r\n   at Microsoft.Xrm.Telemetry.XrmTelemetryExtensions.Execute(ILogger logger, XrmTelemetryActivityType activityType, Action action)\r\n   at Microsoft.Crm.Extensibility.OData.EntityController.GetEntitySetInternal(String entitySetName, String castedEntityName, CrmODataExecutionContext context, CrmEdmEntityObjectCollection crmEdmEntityObjectCollection, ODataQueryOptions queryOptions)\r\n   at Microsoft.Crm.Extensibility.OData.EntityController.GetEntitySetImplementation(String entitySetName)\r\n   at Microsoft.PowerApps.CoreFramework.ActivityLoggerExtensions.Execute[TResult](ILogger logger, EventId eventId, ActivityType activityType, Func`1 func, IEnumerable`1 additionalCustomProperties)\r\n   at Microsoft.Xrm.Telemetry.XrmTelemetryExtensions.Execute[TResult](ILogger logger, XrmTelemetryActivityType activityType, Func`1 func)\r\n   at lambda_method(Closure , Object , Object[] )\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
    }
}

}

我尝试使用https://services.odata.org/V4/OData/OData.svc/ ODATA服务，并且该服务按预期工作。 我知道问题出在服务上，但由于两个服务都相似，因此无法弄清确切原因。