Attach to Chrome and use the same Unattended session for two PAD flows?

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Posted on by Sima-C

Hello,

I have two desktop flows triggered by a cloud one:

The first desktop flow outputs a b64 image captcha code.
Then this is used to send an adaptive card to teams and wait for the user to respond.
After the user responded, the second flow attaches to the running instance and populates the filed with the user input.

So basically it launches a new Chrome page in the first desktop flow and on the second flow it attaches to it in order to login.

Below is a diagram of the flow

The first desktop flow creates a session on the machine, my question is regarding the second flow.

Does the second flow uses the same session or create another one?

I ran this flow in attended mode and it was successful end-to-end, however when it is in unattended it not working properly as only the first PAD flow is successful .

Error message for the Launch and Attach to Chrome by URL in the second PAD flow action:

 "code": "WebAutomation.LaunchChromeError",
 "message": "Problem while executing action 'AttachToChromeByUrl'. Failed to assume control of Chrome (communication with browser failed. Make sure add-on is installed). \r\n \r\nMicrosoft.Flow.RPA.Desktop.Modules.SDK.ActionException: Failed to assume control of Chrome (communication with browser failed. Make sure add-on is installed). --->

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Power Automate Desktop

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Agnius Bartninkas Most Valuable Professional on at

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It's not the same session. The first flow ends the session when it finishes and the next flow starts a new session.

You will need to figure out a different way to do this, in which the entire flow can run as a single desktop flow. You could look into alternatives, such as sending an API request via the Invoke web service action in the desktop flow to a cloud flow, that sends the adaptive card, then maybe making the cloud flow push the text input into a local file that the desktop flow would wait for, or something like that.

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Sima-C 21 on at

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Hey, thank you!
I solved it by using the documentation for the unattended runs.
Sima-C 21 on at

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I'm leaving this in case someone needs it.

To allow reusing Windows session:
Sign in to Power Automate.
Select Monitor, and then select Machines.
Select the target machine or machine group.
Select Settings in the Command bar.
Enable Reuse sessions for unattended runs.