Error when adding server via WMI

jwest_6990

I'm attempting to add a server to Otter via WMI, instead of the Inedo agent, but I'm running into an issue. Otter administration is showing this error:
Error scanning PowerShell agent: Could not load file or assembly 'Microsoft.Management.Infrastructure, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.

Is there something I'm missing?

stevedennis

Hi @jwest_6990

What Windows server version is Otter installed on? That might help us narrow this down.

We have seen that error if RSAT is not enabled:
https://learn.microsoft.com/en-us/troubleshoot/windows-server/system-management-components/remote-server-administration-tools

Cheers,
Steve

jwest_6990

Hi Steve,

Thanks for the response. I'm running Windows Server 2019. Following your suggestion about RSAT, I installed every available RSAT, but had the same issue. After installation, I restarted the the Otter and web services, but the problem remained, so I rebooted the server, but still see the error.

I've done some manual testing in PowerShell, and found that Test-WSMan, Enter-PSSession, and Invoke-Command all work without issue.

rhessinger

Hi @jwest_6990,

Are you running Otter on Windows or on Linux (using Docker)?

Thanks,
Rich

jwest_6990

@rhessinger
Hello Rich,

Otter is running on Windows Server 2019, and I installed it via the Inedo Hub.

Thanks

rhessinger

Hi @jwest_6990,

I'm sorry, somehow I missed that in your previous response. I'm going to attempt to recreate this in our test lab and see if I can get the same error. I'll let you know what I find.

Thanks,
Rich

rhessinger

Hi @jwest_6990 ,

So I'm struggling to reproduce this error. For me, it just seems to work. I'm wondering if maybe a DLL got removed (possibly an antivirus false-positive) or conflict with something else installed on the host. Are you able to see a full stack trace? Do you have anything else installed on your Otter server?

Thanks,
Rich

jwest_6990

I hate to say this, but its working now. Without making any configuration changes, I uninstalled Otter via the Inedo hub, rebooted the server, then reinstalled Otter. I was then able to add an agentless server without issue.

I'm obviously happy that it's now working, but I'm sorry for making you look into this.

Thanks.