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Power Platform Community / Forums / Power Automate / Power Automate Desktop...
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Power Automate Desktop UI element picker malfunction ''Cannot access a closed pipe"

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Posted on by 1,757

Hello, any ideas/helps on the below would be appreciated.

 

I am trying to create a flow in PAD and when trying to select an UI element in either Chrome/Edge browser the red rectangle around the elements does appear, but CTRL + left click does not lead to inclusion of the element in de flow. Instead the message 'Get Power Automate extention' appears as if the extention has not been installed.

  • The extention is (re-)installed several times and the error happens both in Chrome and Edge.
  • I am using Power Automate desktop on a virtual machine.

The event viewer creates an error (which I think is related), please view below.

 

"TaskScheduler_UnobservedTaskException
Message = A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.
Error = System.AggregateException
Full text = System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. ---> System.ObjectDisposedException: Cannot access a closed pipe.
at System.IO.__Error.PipeNotOpen()
at System.IO.Pipes.NamedPipeServerStream.CheckConnectOperationsServer()
at System.IO.Pipes.NamedPipeServerStream.EndWaitForConnection(IAsyncResult asyncResult)"

I have the same question (0)
  • mcnemare1 Profile Picture
    214 on at

    @Koen5 

     

    I am running into the same error, when I am trying to run our first PAD flow scheduled with RAP.  Did you ever figure out how to resolve this?

     

     

    TaskScheduler_UnobservedTaskException
    Message = A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.
    Error = System.AggregateException
    Full text = System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. ---> System.ObjectDisposedException: Cannot access a closed pipe.
    at System.IO.__Error.PipeNotOpen()
    at System.IO.Pipes.NamedPipeServerStream.CheckConnectOperationsServer()
    at System.IO.Pipes.NamedPipeServerStream.EndWaitForConnection(IAsyncResult asyncResult)
    at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
    --- End of inner exception stack trace ---
    ---> (Inner Exception #0) System.ObjectDisposedException: Cannot access a closed pipe.
    at System.IO.__Error.PipeNotOpen()
    at System.IO.Pipes.NamedPipeServerStream.CheckConnectOperationsServer()
    at System.IO.Pipes.NamedPipeServerStream.EndWaitForConnection(IAsyncResult asyncResult)
    at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)<---

     

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