Handle errors in ScriptBlock in Invoke-Command Cmdlet

Question

I am trying to install a service on a remote machine using the powershell.

So far I have the following:

Invoke-Command -ComputerName  $remoteComputer         


        

Answer 1

The Invoke-Command argument list is a one way deal. You can either output the error variable in the script e.g. on the last line of the scriptblock put:

$errortext

or better yet, just don't capture the error via the -ErrorVariable at all. The scriptblock output, including errors, will flow back to the caller even over a remote connection.

C:\> Invoke-Command -cn localhost { Get-Process xyzzy } -ErrorVariable errmsg 2>$null
C:\> $errmsg
Cannot find a process with the name "xyzzy". Verify the process name and call the cmdlet again.
    + CategoryInfo          : ObjectNotFound: (xyzzy:String) [Get-Process], ProcessCommandException
    + FullyQualifiedErrorId : NoProcessFoundForGivenName,Microsoft.PowerShell.Commands.GetProcessCommand
    + PSComputerName        : localhost

In general, I think it is much better to keep errors on the error stream, separated from the normal output.