Powershell WMIObject Error Handling -

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i have code connects remote servers. need write text-file if connection server cannot made. i've done code:

try     {         $w3wpresult = (get-wmiobject win32_process -filter "name 'w3wp%'" -computername $server | select name, @{l= "private memory (gb)"; e={$_.privatepagecount / 1gb}})         $vmresult = (get-wmiobject win32_process -filter "name 'w3wp%'" -computername $server | select name, @{l= "virtual memory (gb)"; e={$_.virtualsize / 1gb}})         $vmmemory += $server + " @ " + $time + ": " + (($vmresult|%{"$_"})-join',') + "`r`n"         $w3wpmemory += $server + " @ " + $time + ":" + (($w3wpresult|%{"$_"})-join',') + "`r`n"     }     catch [system.runtime.interopservices.comexception]     {         if($_.exception.errorcode -eq 0x800706ba)         {             $errormessage = "unable connect server"          }          $vmmemory += $server + " @ " + $time + ": " + $errormessage         $w3wpmemory += $server + " @ " + $time + ": " + $errormessage     }

the $errormessage variable not holding error message.

any appreciated. thanks.

just include error action preference wmi commands like:

(get-wmiobject win32_process -filter "name 'w3wp%'" -computername $server -erroraction stop

this should catch non-terminating errors . include generic catch block catch exceptions not mentioned.

try {   #wmi commands } catch [system.runtime.interopservices.comexception] {   #specific error caught } catch {   #generic error caught }

technet topic on try catch


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