Symptoms
Multiple symptoms are visible for the user here:
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Desktop flows runs for longer than expected
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Desktop flows failed after a long time (~ 3 hours)
Solving steps
There are multiple ways the agent can be busy:
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There is already a desktop flow running on the machine right now; you should make sure you are not currently already running a desktop flow using the same connection. Note that if using a gateway cluster, there is currently no easy way to determine on which exact machine the desktop flow is running. You can see if a desktop flow is running if logged into the machine by looking at the tray icon in the notification bar; it indicates if the UI Flow Service is currently available or running.
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If you are currently recording something on the same machine, desktop flows will be considered as busy, which may lead to this situation. You should ensure you are not recording or testing while running a desktop flow.