try catch not catching specific error

[noaboa]

Hello, 

I'm refining my script and trying to handle errors and write nice error messages. But somehow the catch of an specifiy error will not work.

Here's my code:

try {

    Connect-VIServer -Server $serverconfig.vCenterServer -ErrorAction Stop

}

Catch [VMware.VimAutomation.ViCore.Types.V1.ErrorHandling.InvalidLogin] {

    Write-Host "Wrong Credentials"

    $vmcheck = 1

}

try {

Disconnect-VIServer * -Confirm -ErrorAction Ignore

}

catch [VMware.VimAutomation.ViCore.Cmdlets.Commands.DisconnectVIServer]{

write-host "no connections to disconnect"

}

try {

Disconnect-VIServer * -Confirm -ErrorAction Ignore

}

catch [VMware.VimAutomation.ViCore.Cmdlets.Commands.DisconnectVIServer]{

write-host "no connections to disconnect"

}

what am I doing wrong? How should I handle these kind of error?

Thanks and best 

Noah

[LucD]

Since you are not providing the User/Password on the Connect-VIServer cmdlet, the cmdlet will first try the VICredentialStore and then SSPI (your current account).

If neither method provides a valid credential, you will be prompted for user/password.

See also about_server_authentication

What happens when you run this?

Do you get logged on?
Or do you get an error?

[noaboa]

Well that's my intention. I then get prompted for my credentials Iwith which I want to connect to the vCenter. If I enter correct credentials the connection get's established. If not it troughs an error and I wan't to catch this error.  

Strange... I just tested it again... The catch of the wrong login works now but the disconnect of the vcenter is still not getting caught.

[noaboa]

Well that's my intention. I then get prompted for my credentials Iwith which I want to connect to the vCenter. If I enter correct credentials the connection get's established. If not it troughs an error and I wan't to catch this error.  

Strange... I just tested it again... The catch of the wrong login works now but the disconnect of the vcenter is still not getting caught.

[LucD]

For me the Connect-VIServer is working correctly when prompted.

On the Disconnect-VIServer you seem to have -ErrorAction Ignore.

That will definitely not cause a terminating error and will never enter the catch-block.

[noaboa]

Well that doesn't matter, with or without it doesn't catch the error.

[LucD]

It does matter, the try-catch construct only works with a terminating error.

With Ignore the code will never get into the catch-block.

What kind of error are you getting on the Disconnect-VIServer?

[noaboa]

Yes, sorry I meant for me it doesn't matter if with or without I still get the same error.

This error:

Disconnect-VIServer : 31.01.2020 14:54:35 Disconnect-VIServer Could not find any of the servers specified by name.

In Zeile:2 Zeichen:1

+ Disconnect-VIServer * -Confirm

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : ObjectNotFound: (VMware.VimAutom...Server[] Server:RuntimePropertyInfo) [Disconnect-VIServer], ServerObnFailureException

    + FullyQualifiedErrorId : Core_ObnSelector_SetNewParameterValue_ServerSpecifiedButNotFound,VMware.VimAutomation.ViCore.Cmdlets.Commands.DisconnectVIServer

[LucD]

Ok, use the Stop action and use the correct exception type (your's isn't).
The 2nd issue, the "Could not find ..." doesn't generate a specific exception, but the general VimException one.

That means that you will have to test in the catch-block what the specific error is.

Something like this

try {

    DisConnect-VIServer -Server * -ErrorAction Stop

}

Catch [VMware.VimAutomation.Sdk.Types.V1.ErrorHandling.VimException.VimException] {

    if($error[0].Exception.ErrorCategory -eq 'objectNotFound'){

        Write-Host "Server not found"

    }

}