Could not start executor. A specified logon session does not exist

Help Robot
1

Hello, we have multiple robot accounts on one VM. Robots execute processes every 10 or so minutes but at certain time period usually at about 1 AM all robots fail to launch

Info: Could not start executor. A specified logon session does not exist. It may already have been terminated. (0x80070520)

RemoteException wrapping System.Exception: Could not start executor. A specified logon session does not exist. It may already have been terminated. (0x80070520)
Start Time: 10/13/2022 1:00:01 AM
End Time: 10/13/2022 1:01:12 AM

I have tried to read forums but encountered no solid solution.

3

Hello @NotFranmax
Please check EventViewer . Sometimes it happens that sessions is not logged off correctly and hangs out still. So next run can’t log to the machine because session is still taken

4

@NotFranmax ,
This might be raised if already 2 users are already logged on , then the 3rd user (the robot user) is trying to get the unattended session for the same host, then it wont be able to login and thus this error occures

1 Like
5

Hi @NotFranmax

On that speceific VM(Eg. 10.100.205.208) you have how many users?

and in how many users does the robot use for running .

For eg let say we have 4 users in that vm (Bot1, Bot2,Bot3,Bot4)

VM 10.100.205.208 is used for running two process in in two different users(Bot1 and Bot4) and thats it no other user(Bot2,Bot3) can be used for other process we will get the error like could not start executor.

We can only login to two users at a time

Hope this Helps

Regards
Sudharsan

1 Like
6

Thank you for an explanation, You are exactly right - we have 4 users. I thought that high-density setup permits unlimited users. Only 2 users can access VM at the same time?

7

Yes @NotFranmax

8

I am unable to find any info about limitations. Only the word “multiple” is used.
I am starting to suspect that our infrastructure is not high density…

9

Okay Try this

Manually login to the 2 users and then login to another 3rd user you will get a popup to ask one user to disconnect and it will ask you to select one of the user to ask to disconnect something like this

I have faced this many times

Regards
Sudharsan

10

Same thing will happens when a unattended robot tried to login to the third user

11

Out IT will assign licences.

Remote Desktop Session Host option is a Microsoft paid service.

And more robot users should be able to work concurrently.

12

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