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Hi, I have the same error. I tried this solution but it is not working. I got the same error after I updated the service, the HMI app and the Add-on. I found the following versions on Nexeed share: Service: 1.5.13.31 HMI App: 1.5.10.12 Add-on: 1.1.8.0 System info: IPC: R911400799 FWA-VP4***-W10-03V02-A0-HE Nexeed master image: V10.12 11/16/2022 HMI log: 2024-07-19 15:01:59 (A:1483556kB M:88504kB) [Error] <Application> Unhandled Non-UI exception occured: System.Runtime.CallbackException: Async Callback threw an exception. ---> System.TimeoutException: This request operation sent to net.tcp://10.75.33.141:56088/OpCon.EventRecorder/Importer did not receive a reply within the configured timeout (00:00:20). The time allotted to this operation may have been a portion of a longer timeout. This may be because the service is still processing the operation or because the service was unable to send a reply message. Please consider increasing the operation timeout (by casting the channel/proxy to IContextChannel and setting the OperationTimeout property) and ensure that the service is able to connect to the client. Server stack trace: at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result) at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result) at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result) at System.ServiceModel.Channels.ServiceChannelProxy.InvokeEndService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message) 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 Bosch.OpCon.EventRecorder.ImporterService.IImporter.EndGetEntries(IAsyncResult result) at Bosch.OpCon.EventRecorder.ImporterService.ImporterClient.EndGetEntries(IAsyncResult result) at Bosch.OpCon.HMI.Modulo.Forms.ImporterProxy.BeginGetEntriesCallback(IAsyncResult ar) at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously) --- End of inner exception stack trace --- at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously) at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.FinishSend(IAsyncResult result, Boolean completedSynchronously) at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.SendCallback(IAsyncResult result) at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result) at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously) at System.ServiceModel.Dispatcher.DuplexChannelBinder.AsyncDuplexRequest.Done(Boolean completedSynchronously) at System.ServiceModel.Dispatcher.DuplexChannelBinder.AsyncDuplexRequest.TimedOut() at System.ServiceModel.Dispatcher.DuplexChannelBinder.AsyncDuplexRequest.TimerCallback(Object state) at System.Runtime.IOThreadScheduler.ScheduledOverlapped.IOCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* nativeOverlapped) at System.Runtime.Fx.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped) at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP) Have you any other ideas?   Thank you. ... View more