Catching Errors in Native EXEs (Part 1)

by Dec 16, 2014

All Versions

When you run native console EXE commands such as robocopy.exe, ipconfig.exe, or similar commands, you can handle errors raised by these commands:

    $current = $ErrorActionPreference
    $ErrorActionPreference = 'Stop'
    # this will cause an EXE command to emit an error
    # (replace with any console-based EXE command)
    net.exe user nonexistentUser 2>&1
    $ErrorActionPreference = $current
   Write-Host ('Error occured: ' + $_.Exception.Message)

To catch an error, you need to temporarily set $ErrorActionPreference to “Stop”. In addition, you need to redirect the error channel to the output channel by adding “2>&1”.

If you do this, the error can be handled by PowerShell like any .NET error.

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