I have this simple script that will execute text.bat in cmd tool and print result in hello.txt. This is done to target remote server.
Invoke-Command -ComputerName 1.1.1.1 -Credential KOPI\Administrator -ScriptBlock {
Invoke-Expression -Command:"cmd.exe /c 'C:\Users\Administrator.KOPI\Documents\test.bat'"
} | out-file $psscriptroot\hello.txt
However, the bat file encounter error as shown below.
ERROR: The system was unable to find the specified registry key or value.
+ CategoryInfo : NotSpecified: (ERROR: The syst...y key or value.:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
+ PSComputerName : 1.1.1.1
So my question is, if it is possible to print just the error message ERROR: The system was unable to find the specified registry key or value. into hello.txt?
Yes, what you are looking for is catching an exception message ($_.Exception.Message).
For example:
try {
Invoke-Command -ComputerName 1.1.1.1 -Credential KOPI\Administrator -ScriptBlock {
Invoke-Expression -Command:"cmd.exe /c 'C:\Users\Administrator.KOPI\Documents\test.bat'"
} | out-file $psscriptroot\hello.txt
}
catch {
$_.Exception.Message | Out-File $psscriptroot\hello.txt
}
Related
I created a short PowerShell scrtipt in order to import a .reg file (an ODBC) to another server session.
I faced to this warning/issue.
The message is this (below):
The operation completed successfully.
+ CategoryInfo : NotSpecified: (The operation completed successfully.:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
+ PSComputerName : MYSERVERNAME
NotSpecified: (:) [], RemoteException
The script, install without problem the .reg file, but constantly I get the message.
This is my code:
#PARAMETERS - Variables
$Serverlist = Get-Content C:\ServerList.txt
try
{
Foreach ($ServerName in $Serverlist)
{
$session = New-PSSession -ComputerName $servername
Write-Host -Foregroundcolor Green "Copying ODBC Driver for $servername"
$copy_cmd = "C:\MYFILE.reg"
Copy-Item $copy_cmd \\$servername\C$\ -recurse -force;
Write-Host -Foregroundcolor Green "ODBC Successfully copied on $servername"
#$session = New-PSSession -ComputerName $servername
Invoke-Command -Session $session -ScriptBlock {
#Start-Process
reg import C:\CopiedFile.reg #This line generate the message
Write-Host -Foregroundcolor Green "ODBC was installed
}
catch
{
Write-Host "ERROR" -Foregroundcolour Red
exit
}
I tried to incapsulate the Invoke-Command or reg import in to try - catch statement, but the message still appear. I used another command, instead reg import, but the nothing change.
I can use this command line, but I would like to catch the error.
Write-Host -Foregroundcolor Green "ODBC is installed " } ##-ErrorAction SilentlyContinue
There is any way to get the eventually error or handle the message.
Thanks in advance.
If the try block does not generate a terminating error, it will not move into the Catch block. This is controlled by -ErrorAction parameter. So you can set
Invoke-Command Session $session -ScriptBlock {} -ErrorAction Stop
This will cause the Invoke-Command Cmdlet to generate terminating errors(if any error occurs) allowing catch block to execute.
When I run the following command in my script I expect packet_dump.pcap to get generated after I stop the script but nothing gets generated.
Start-Job -Name $tsharkJobName -ScriptBlock { & $tsharkPath --interface $interfaceNo -w "packet_dump.pcap" } | Out-Null
When I run the line below:
Receive-Job $tsharkJobName -Force
This is the error message that I get (where $interfaceNo is 5 which is the ID for Wi-Fi):
Capturing on 'Wi-Fi'
+ CategoryInfo : NotSpecified: (Capturing on 'Wi-Fi':String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
+ PSComputerName : localhost
I have this at the end of the script as well:
finally {
Stop-Job $tsharkJobName
Remove-Job $tsharkJobName -Force
}
$args = "--interface " + $interfaceNo + " -w packet_dump.pcap"
Start-Process $tsharkPath -ArgumentList $args -NoNewWindow
and
finally {
Stop-Process -Name "tshark"
}
Solves this.
I need to get some procs by the owner. My demo script below will first look for procs by owner locally, then it will do the same thing, but it invokes the command on the same box:
cls
write-host 'LOCAL CALL: '
$procs = #(Get-WmiObject win32_process |? {($_.getowner().user -eq 'APP_ACCOUNT') })
write-host $procs.count
$func = {
$procs = #(Get-WmiObject win32_process |? {($_.getowner().user -eq 'APP_ACCOUNT') })
write-host $procs.count
}
write-host 'REMOTE CALL: '
$session = New-PSSession -ComputerName 'SERVER'
$job = Invoke-Command -Session $session -ScriptBlock $func -AsJob
Wait-Job -Job $job
$job | Receive-Job
$job | Remove-Job
Remove-PSSession -Session $session
Most of the time when I run my script it errors with the following output:
LOCAL CALL:
38
REMOTE CALL:
Id Name PSJobTypeName State HasMoreData Location Command
-- ---- ------------- ----- ----------- -------- -------
26 Job26 RemoteJob Completed True SERVER ...
Exception calling "GetOwner" : "Not found "
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : WMIMethodException
+ PSComputerName : SERVER
38
So that first 38 is the number of procs it found for the owner running locally. It finds 38 the second time as well, but errors calling getowner. I don't understand why since it worked the first time. Is it operating in some kind of "bubble" when I invoke the command? In my larger script this is causing me more severe issues as the job state goes to failed and execution halts even though it is throwing the same error. One problem at a time though.
Seems I needed to do a better job of making sure my processes still exist before filtering by owner:
$procs = #()
$allProcs = #(Get-WmiObject win32_process)
foreach($proc in $allProcs)
{
$procActive = get-process -Id $proc.processId -ErrorAction SilentlyContinue
if($procActive)
{
if($proc.getowner().user -eq 'jdholbrook')
{
$procs += $proc
}
}
}
write-host $procs.count
This is probably because the process for which you want to query the owner doesn’t exist anymore.
You can simulate this behaviour on your local PC as follows:
Start some application, like notepad.exe for example. Now run:
$w = (Get-WmiObject win32_process) # Your notepad process will now be the last in the `$w` array.
Close the notepad.exe process.
Now pipe the contents of $w to get the owners:
$w | % {$_.getowner()}
For the last object you will get:
Exception calling "GetOwner" : "Not found "
At line:1 char:20
+ $w | % {$_.getowner <<<< ()}
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : WMIMethodException
To make sure this is the notepad.exe you just closed you can double-check:
$w[-1]; # last object
$w[-1].getowner(); # error
So, now you know what is causing, you can start thinking about how to handle it...
I have a problem with the catch command. I have the following script I'm trying to process:
Try
{
Add-Computer -DomainName "MyDomain.Dom" -Credential $DomainCred -PassThru -ErrorAction Stop
}
Catch [System.InvalidOperationException]
{
"Your computer is unable to contact the domain"
}
Every time I run this though I am not getting anything in the catch block. Here is the error reported that I get from the script:
PSMessageDetails :
Exception : System.InvalidOperationException: This command cannot be executed on target computer('') due to following error: The specified domain either does not exist or could not
be contacted.
TargetObject :
CategoryInfo : InvalidOperation: (MYPC:String) [Add-Computer], InvalidOperationException
FullyQualifiedErrorId : InvalidOperationException,Microsoft.PowerShell.Commands.AddComputerCommand
ErrorDetails :
InvocationInfo : System.Management.Automation.InvocationInfo
PipelineIterationInfo : {0, 1}
Any ideas?
A working solution (thanks to PK and Patrick for their combined contributions):
Try
{
Add-Computer -DomainName "MyDomain.Dom" -Credential $DomainCred -PassThru -ErrorAction Stop
}
Catch [System.Management.Automation.RuntimeException]
{
"Your computer is unable to contact the domain"
}
Try catching System.Management.Automation.RuntimeException instead of System.InvalidOperationException.
Try
{
Add-Computer -DomainName "MyDomain.Dom" -Credential $DomainCred
}
Catch [System.Management.Automation.RuntimeException]
{
'Error: {0}' -f $_.Exception.Message
}
Add "-ErrorActionPreference Stop" to your cmdlet.
For instance,
Add-Computer -DomainName "MyDomain.Dom" -Credential $DomainCred -EA Stop
There does seem to be a few inconsistencies with the ways that different cmdlets process errors, especially those "add-on" cmdlets like the Active Directory ones. However, I think the basic idea is that PowerShell catch only catches terminating errors, of which your exception above isn't by default. So by using -EA Stop you're forcing it be a terminating error, which triggers the catch block.
Here's Ed Wilson on the subject: Write PowerShell Functions That Accept Pipelined Input
I was able to get this to work:
Try
{
Add-Computer -DomainName "MyDomain.Dom" -Credential $DomainCred -PassThru -ErrorAction Stop
}
Catch
{
"Your computer is unable to contact the domain"
}
-PassThru on the Add-Computer command returns the results of the command to the shell.
-ErrorAction Stop tells PowerShell to stop when it encounters an error; this suppresses the error output you were seeing.
FullName
--------
System.Management.Automation.RuntimeException
The object of type "Microsoft.PowerShell.Commands.Internal.Format.FormatStartData" is not valid or not in the correct sequence. This is likely caused by a user-specified "f
ormat-list" command which is conflicting with the default formatting.
+ CategoryInfo : InvalidData: (:) [out-lineoutput], InvalidOperationException
+ FullyQualifiedErrorId : ConsoleLineOutputOutOfSequencePacket,Microsoft.PowerShell.Commands.OutLineOutputCommand
Putting the -Passthru on it allowed it to catch the error.
I'm using PSRemoting with the WebAdministration module to get info about various sites, and it's working. I am, however, receiving an annoying non-fatal COM exception during invocation of the command, and wondering if anyone else has resolved it. Here's a minimal implementation:
cls
$command = {
param($alias)
Import-Module 'WebAdministration'
$binding = Get-WebBinding -HostHeader $alias
$binding
}
$server = 'server'
$args = #('alias')
$session = New-PSSession -ComputerName $server
Write-Host ("Invoking")
try {
Invoke-Command -Session $session -ScriptBlock $command -ArgumentList $args
Write-Host ("Invoked")
} catch {
Write-Host ("Caught $_")
} finally {
Write-Host ("Removing")
Remove-PSSession -Session $session
Write-Host ("Removed")
}
And here are the results:
Invoking
protocol : http
bindingInformation : 10.x.x.x:80:alias
...
Schema : Microsoft.IIs.PowerShell.Framework.ConfigurationElementSchema
An unhandled COM interop exception occurred: Either the application has not called WSAStartup, or WSAStartup failed. (Exception from HRESULT: 0x800
7276D)
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : COMException
Invoked
Removing
Removed
I observe the result is returned prior to the error being thrown.
Amusing details:
- Get-Website, Get-Item "IIS:\...", Get-WebBinding all result in the same error
- Running $command directly on the target machine as written results in no error
- Get-Item "d:\..." does not result in any error
- The COM error doesn't
I was able to work around the issue using the following:
$iisIpAddresses = Invoke-Command -Session $session -scriptblock {
if (!(Get-Module WebAdministration))
{
Import-Module WebAdministration
}
$iisBindings = Get-WebBinding
[String[]]$iisBindings = $iisBindings | Select bindingInformation
$iisBindings
}
Remove-PSSession $session
This is buried somewhere deep in the bowels of PowerShell's implementation of .NET and winsock. It's below anything I can calibrate, so I've added " -ErrorAction SilentlyContinue" to my remote invoke. It doesn't fix anything, but everything works correctly. That's answer enough for now, I guess.