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Use the ErrorActionPreference Variable in PowerShell
ErrorActionPreference variable in PowerShell is to control the non-terminating errors by converting them to terminating errors. Error handling depends upon which value you assign to $ErrorActionPreference variable.
The values are as below.
Continue − This is the default value of the variable and when the error occurs, an error is displayed in the PowerShell console, and the script continues the execution.
Get-WmiObject -Class Win32_Logicaldisk -ComputerName Nonexist Write-Host "Hello World"
Output
Get-WmiObject -Class Win32_Logicaldisk -ComputerName Nonexist Write-Host "Hello World" Get-WmiObject : The RPC server is unavailable. At line:2 char:1 + Get-WmiObject -Class Win32_Logicaldisk -ComputerName Nonexist + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidOperation: (:) [Get-WmiObject], COMException + FullyQualifiedErrorId : GetWMICOMException,Microsoft.PowerShell.Commands.GetWmiObj ectCommand Hello World
Stop − Error will not be displayed in the console and further pipeline execution is stopped. In the below example, there will be no output.
$ErrorActionPreference = "Stop" Get-WmiObject -Class Win32_Logicaldisk -ComputerName Nonexist Write-Host "Hello World"
SilentlyContinue − Error output will not be displayed and the script executes the next commands in the pipeline.
$ErrorActionPreference = "SilentlyContinue" Get-WmiObject -Class Win32_Logicaldisk -ComputerName Nonexist Write-Host "`nHello World" -BackgroundColor DarkGreen
Output −
PS C:\WINDOWS\system32>> $ErrorActionPreference = "SilentlyContinue" Get-WmiObject -Class Win32_Logicaldisk -ComputerName Nonexist Write-Host "`nHello World" -BackgroundColor DarkGreen Hello World
Inquire − It waits for user prompt if an error occurs and asks for continue. An error will be displayed.
$ErrorActionPreference = "Inquire" Get-WmiObject -Class Win32_Logicaldisk -ComputerName Nonexist Write-Host "`nHello World" -BackgroundColor DarkGreen
Output
If you press “Yes/Yes to All” then error output will be displayed and “Halt Command/Suspend” will not display an error.
Suspend − This value is used in the PowerShell workflow to suspend workflow for investigation purposes and then resume.
When you close the PowerShell session, the value of the $ErrorActionPreference will be set to default i.e. Continue.
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