IOS-XR unable to SSH on 2025.2.14.0
Getting a generic error "An unexpected error occured. Error code: FAIL; Non specific error." upon SSHing to any of our IOS-XR devices after upgrade to 2025.2.14.0. Checked various other device types and no others have the issue that I have found.
I do notice that on devices that have a MOTD, that does show up before the error comes up and closes the sesssion.
Recommended Answer
Hi Nick,
Could you please double-check the following in your SSH entry?
- Go to the Advanced tab and make sure “Skip environment variable setup” is enabled.
- In the same tab, click Environment variables and confirm the list is completely empty (no variables set).
If the issue still happens after that, could you send us new SSH logs with Verbose level 2? Here’s how to generate them: https://docs.devolutions.net/rdm/kb/how-to-articles/send-ssh-logs-verbose/
Best regards,
Alexis Geller Peiro
Alexis Geller Peiro
All Comments (7)
Hello,
Thank you for reaching out on this matter.
Can you share any related logs from Help > Application Logs?
Can you also share any verbose logs that you can configure via the entry properties under Terminal > Advanced?
https://docs.devolutions.net/rdm/kb/how-to-articles/send-ssh-logs-verbose/
You could also try running a debug profile, as this might help as well:
https://docs.devolutions.net/rdm/commands/help/profiler/
I will send you a link in your private messages on the forum so you can share all the information directly.
Best regards,
Jacob Lafrenière
@Jacob Lafrenière
Jacob,
Thanks for the help. I've uploaded the log from one of the devices, it seems to hang up here "Sending environment variable request: LANG=en_US.UTF-8". Performance profiling did not seem to provide any useful detail.
Thanks,
Tynan
Hello,
Thank you for the follow-up and for providing the logs.
I’ll investigate this further with our development team and will update you as soon as I have more information.
Best regards,
Jacob Lafrenière
Hello,
Thank you for your patience.
It was faster than I tought, this is a current known issue we have and it is fixed in the next scheduled release.
I will follow up with you as soon as the fix is deployed in the next update.
Best regards,
Jacob Lafrenière
It seems like this issue might be back? I am encountering the same issue as described on 2025.3.29.0
Devolutions.ProtocolsSharp: 2026.1.7.1 OS: Windows
The server did not accept the environment variable
Shell request failed
Bytes sent: 1920, Bytes received: 2016
Packets sent: 11, Packets received: 12
Kex completed: 1
Hi Nick,
Could you please double-check the following in your SSH entry?
- Go to the Advanced tab and make sure “Skip environment variable setup” is enabled.
- In the same tab, click Environment variables and confirm the list is completely empty (no variables set).
If the issue still happens after that, could you send us new SSH logs with Verbose level 2? Here’s how to generate them: https://docs.devolutions.net/rdm/kb/how-to-articles/send-ssh-logs-verbose/
Best regards,
Alexis Geller Peiro
Alexis Geller Peiro
After checking the "Skip environment variable setup" box then I am able to connect successfully