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Asked: 2026-05-11T01:48:13+00:00

I’m trying to modify the contents of an MSI file using Powershell. To do

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I’m trying to modify the contents of an MSI file using Powershell. To do so I create an instance of a WindowsInstaller.Installer then use $installer.OpenDatabase and $database.OpenView. Similar functionality works in VBScript and I’ve seen samples on-line that appear to work.

$installer = new-object -comobject 'WindowsInstaller.Installer' $database = $installer.OpenDatabase('C:\Temp\Setup.msi', 1)

For the above code, I get an error ‘Method invocation failed because [System.__ComObject] doesn’t contain a method named ‘OpenDatabase’.’

$installer = new-object -comobject 'WindowsInstaller.Installer' $database = $installer.InvokeMethod('OpenDatabase','C:\Temp\Setup.msi', 1)

If I attempt to use $installer.InvokeMethod I get the same error ‘Method invocation failed because [System.__ComObject] doesn’t contain a method named ‘InvokeMethod’.’

Any help would be much appreciated.

Thanks.

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1 Answer

  1. See the this thread for some guidance. Basically the MSI COM object is implemented in a way that confuses PS. There is a link to a blog post discussing it in that thread.

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