Uninstall working but returning an error in PS Console

This topic contains 2 replies, has 2 voices, and was last updated by  Josiah Blaisdell 4 years, 6 months ago.

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  • #4684

    Josiah Blaisdell
    Participant

    Hello Folks,

    I just started using Powershell for the first time last week. I'm the only one in my office that knows has started to use Powershell and I need to be able to do a lot with it in a short amount of time.

    Today I got Powershell working so that I could start a new pssession with a remote computer (so satisfying when it finally worked 🙂 ). I wanted to start out by just uninstalling a test version of an application so that I can reinstall the latest version. I got the application uninstalled but Powershell returned an error and I don't know why and it's bothering me.

    So... here are my steps:
    1.  I entered my PSSession with my test computer:

    Enter-PSSession JosiahTest -Credential JosiahTest\johnnydepp

    2. I created a variable called $app and assigned that variable to the result of a WmiObject -Class Win32_Product query:

    $app = Get-WmiObject -Class Win32_Product -Filter "Name LIKE 'AppUnderTest%'"

    3. I realized that while I did successfully get the application I was looking for I forgot to uninstall it so I did this:

    $app = Get-WmiObject -Class Win32_Product -Filter "Name LIKE 'AppUnderTest%'" $app.Uninstall()

    4. I waited for awhile, the script seemed to be working, I was refreshing my 'Add or Remove' programs window on my test system and much to my satisfaction the AppUnderTest was removed! Unfortunately about a minute later Powershell returned this:

    Get-WmiObject : Invalid query
    At line:1 char:21
    + $app = Get-WmiObject < <<<  -Class Win32_Product -Filter "Name LIKE 'AppUnderTest%'"
    $app.Uninstall()
        + CategoryInfo          : InvalidOperation: (:) [Get-WmiObject], ManagementExc
       eption
        + FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Comma
       nds.GetWmiObjectCommand

    I feel like I was so close, then I got an error... What have I done wrong? It looks like a valid query, it uninstalled the program, but for some reason I still got an error.

  • #4810

    Don Jones
    Keymaster

    Not a terribly useful error.

    Try doing this without Remoting, if you can. Get-WmiObject is capable of connecting to a remote computer. Pipe the result to Invoke-WmiMethod, giving it method name Uninstall. That might remove a layer or two and get a better error message, if nothing else.

  • #4849

    Josiah Blaisdell
    Participant

    I tried to pipe the result to Invoke-WmiMethod like this:

    $app = Get-WmiObject -Class Win32_Product -Filter "Name LIKE 'AppUnderTest%'" | Invoke-WmiMethod $app.Uninstall()

    I got a prompt asking me for a WmiMethod, I entered "Uninstall"

    The command completed without error but my app was not uninstalled. I have a feeling I'm not piping it correctly.

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