Unable to start executions

I am getting the below error.I am unable to run the flow @nadim.warsi
19.2.0-beta.13+Branch.release/v2019.2.Sha.a9098bb17807307240ba61948866f14f6c276393

The message with Action ‘http://tempuri.org/IUiPathRemoteDuplexContract/SubscribeToEvents’ cannot be processed at the receiver, due to a ContractFilter mismatch at the EndpointDispatcher. This may be because of either a contract mismatch (mismatched Actions between sender and receiver) or a binding/security mismatch between the sender and the receiver. Check that sender and receiver have the same contract and the same binding (including security requirements, e.g. Message, Transport, None).

System.ServiceModel.ActionNotSupportedException: The message with Action ‘http://tempuri.org/IUiPathRemoteDuplexContract/SubscribeToEvents’ cannot be processed at the receiver, due to a ContractFilter mismatch at the EndpointDispatcher. This may be because of either a contract mismatch (mismatched Actions between sender and receiver) or a binding/security mismatch between the sender and the receiver. Check that sender and receiver have the same contract and the same binding (including security requirements, e.g. Message, Transport, None).

Server stack trace:
at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object ins, Object outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(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 UiPath.Models.IUiPathRemoteDuplexContract.SubscribeToEvents(ServiceEventsFilter filter)
at UiPath.Models.UiPathDuplexProxy.StartJob(JobModel job, Nullable`1 eventSubscription, String password)
at UiPath.Studio.Plugin.Workflow.Services.RobotStudioBridge.Execute(WorkflowDocument document, Boolean isDebugging)

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@Mareeswar - Have you recently upgraded your UiPath installation? The easiest solution to get rid of this error is to uninstall all UiPath versions from your system and then reinstall the latest version of UiPath.

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For anyone with this issue, please try restarting your machine first :slight_smile: Actually, it is to try each step first before the other:

  1. Restart Robot service
  2. Restart Machine
  3. Reinstall

In this order :wink:

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