Powershell Error Handling not working in Invoke-command block - powershell

Question

I want to print error message when service is not found or machine is offline
$csv = Import-Csv "C:\Users\user\Desktop\computers.csv" -delimiter ","
foreach ($cs in $csv){
$computers = $cs.DNSHostname
foreach ($computer in $computers){
Try{
Invoke-Command -ComputerName $computer -ScriptBlock {
$ProcessCheck = Get-Process -Name agentid-service -ErrorAction Stop
if ($null -eq $ProcessCheck) {
Write-output "agentid-service IS not running $env:computername"
}
else {
Write-output "agentid-service IS running $env:computername"
}
}
}
catch{
Write-Warning $Error[0]
}
}
}
Instead, when service name is not found, i'm getting error:
Cannot find a process with the name "agentid-service". Verify the process name and call the cmdlet again.
And if connection to computer is not possible then getting:
[vm.domain.local] Connecting to remote server vm.domain.local failed with the following error message : The WinRM client cannot process the request because the server name cannot be resolved.
And script continue execution (as it should).
How can i get "Catch" block to be executed ?

Answer 1

You can do this in one foreach loop.
Try
$computers = (Import-Csv "C:\Users\user\Desktop\computers.csv").DNSHostname
foreach ($computer in $computers) {
if (!(Test-Connection -ComputerName $computer -Count 1 -Quiet)) {
Write-Warning "Computer $computer cannot be reached"
continue # skip this one and proceed with the next computer
}
try{
Invoke-Command -ComputerName $computer -ScriptBlock {
$ProcessCheck = Get-Process -Name 'agentid-service' -ErrorAction Stop
if (!$ProcessCheck.Responding) {
"agentid-service is NOT not running on computer '$env:computername'"
}
else {
"agentid-service is running on computer '$env:computername'"
}
}
}
catch{
Write-Warning $_.Exception.Message
}
}

Answer 2

Thanks to #Theo's answer, managed to fix it:
$csv = Import-Csv "C:\Users\user\Desktop\computers.csv" -delimiter ","
foreach ($cs in $csv){
$error.Clear()
$computers = $cs.DNSHostname
foreach ($computer in $computers){
Try{
Invoke-Command -ComputerName $computer -ScriptBlock {
$ProcessCheck = Get-Process -Name agentid-service -ErrorAction Stop
if ($null -ne $ProcessCheck) {
Write-output "agentid-service IS running $env:computername"
}
} -ErrorAction Stop
}
catch{
if ($null -eq $ProcessCheck){
Write-warning "agentid-service IS not running $env:computername"
}
Write-Warning $Error[0]
}
}
}