SSH connection failing randomly through the day

[Dylan022]

Hey,

Having a new issue where one of our SFTP connections are failing.

E: 11/4/2025 1:30:44 PM: Can't open SFTP session
E: 11/4/2025 1:30:44 PM: FATAL ERROR: Couldn't agree a client-to-server cipher (available: aes128-gcm@openssh.com,aes256-gcm@openssh.com)

It happens a few times throughout the day and other times during the day there are no issues.

I created a putty profile and moved some of the other ciphers down to warn below but it doesn't seem to help. Am I not doing it right or is there something else I can do different? I included a screenshot of the putty config for the ciphers and then a pic to show that the SFTP connection has the profile selected

[Oleg]

Try to update PSFTP.EXE module.
We are currently using PSFTP.EXE version 0.76 in installation package.
The PUTTY package is now at version 0.83, released on 2025-02-08 (see here).
This may help.
In the next release, we will update PSFTP.EXE to the latest version.

Otherwise you need to reconfigure your SSH server. For example see here

[Dylan022]

I forgot to mention I did try that, I downloaded version .83, renamed the old one with .Old, and placed it in the C:\Program Files\RoboTask. After doing that none of my FTP connections worked.

The error message was a little different, this below.
I: 10/29/2025 8:28:10 PM: Executing "1.Create local variable "COMPANY" with value """
I: 10/29/2025 8:28:10 PM: Executing "2.Create local variable "FILENAMES" with value """
I: 10/29/2025 8:28:10 PM: Executing "3.SFTP Open ()"
E: 10/29/2025 8:29:10 PM: Can't open SFTP session
E: 10/29/2025 8:29:10 PM: Using username "usr".
E: 10/29/2025 8:29:10 PM: Keyboard-interactive authentication prompts from server:
E: 10/29/2025 8:29:10 PM:
E: 10/29/2025 8:29:10 PM: Timeout is over
E: 10/29/2025 8:29:10 PM: An error occurred. Step


Or is there something I needed to do differently?

[Oleg]

I'm very sorry. The issue requires further investigation...

[Dylan022]

no problem, just wanted to make sure there wasn't anything else I needed to do. I downloaded some of the other version in-between the latest and what robotask has now and I am going to try those tonight, I will report back.