Uipath Executor Stopped working

Scenario: Process runs on Orchestor, however after a period of time (24-48hours) A pop-up comes up showing: UiPath Executor has stop working. However robot is still shown as running in Orchestrator dashboard.

Steps to reproduce: Stop robot on orchestrator, run it again and wait for 24-48 hours for the same error to occur.

Current Behavior:

Expected Behavior:

Studio/Robot/Orchestrator Version: 2018.2.3

Last stable behavior: N/A
Last stable version: N/A
OS Version:
Others if Relevant: (workflow, logs, .net version, service pack, etc):

Info: “Execution error : System.OperationCanceledException: An error occurred while calling tracking participants causing the instance to be aborted. See the inner exception for more details. —> System.TimeoutException: This request operation sent to net.pipe://localhost/UiPath/service/executor did not receive a reply within the configured timeout (00:20:00). 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.\r\n\r\nServer stack trace: \r\n at System.ServiceModel.Dispatcher.DuplexChannelBinder.SyncDuplexRequest.WaitForReply(TimeSpan timeout)\r\n at System.ServiceModel.Dispatcher.DuplexChannelBinder.Request(Message message, TimeSpan timeout)\r\n at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object ins, Object outs, TimeSpan timeout)\r\n at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)\r\n at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)\r\n\r\nException rethrown at [0]: \r\n at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)\r\n at System.Activities.Hosting.WorkflowInstance.EndFlushTrackingRecords(IAsyncResult result)\r\n at System.Activities.Hosting.WorkflowInstance.OnEndFlushTrackingRecords(IAsyncResult result)\r\n at System.Activities.Runtime.WorkItem.OnTrackingComplete(IAsyncResult result)\r\n — End of inner exception stack trace —”

I’ve the same error, can you help me?


Add some detailed log mechanism which will write into a text file and check after which points it breaks.

  • If you are using more resources, try to free it once utilized. Like excel reading/writing close the excel once done with that.

If you are on EE (Enterprise Edition) please also contact with our Technical Support:


Contact Technical Support

Contact UiPath Technical Support department.