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Jake
Asked: 2011-12-01 00:32:07 +0800 CST

How to ignore an error in Powershell and let it continue?

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I am trying to see if a process is running on multiple servers and then format it into a table.

get-process -ComputerName server1,server2,server3 -name explorer | Select-Object processname,machinename

Thats the easy part - When the process does not exist or if the server is unavailable, powershell outputs a big ugly error, messes up the the table and doesn't continue. Example

Get-Process : Couldn't connect to remote machine.At line:1 char:12 + get-process <<<<  -ComputerName server1,server2,server3 -name explorer | format-table processname,machinename
+ CategoryInfo          : NotSpecified: (:) [Get-Process], InvalidOperatio   nException    + FullyQualifiedErrorId : System.InvalidOperationException,Microsoft.Power   Shell.Commands.GetProcessCommand

How do I get around this? If the I would still like to get notified if the process isn't available or Running.

powershell

2 Answers

  1. Add -ErrorAction SilentlyContinue to your command.

    When it's not an error, but an unhandled Exception, you should add -EV Err -EA SilentlyContinue, in order to catch the exception. (EA is an alias for ErrorAction)

    You can then evaluate the error in your script, by having a look at $Err[0]

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  2. Short answer: Add $ErrorActionPreference = 'SilentlyContinue' at the start of your code so you don't need to add -ErrorAction SilentlyContinue to every command

    Long answer: Controlling Error Reporting Behavior and Intercepting Errors

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