We have developed a WPF application and have created windows installer using setup project (MSI). One of our clients is facing the problem while installing it.

You've got .NET custom actions, right? That code is apparently crashing. You have an Installer class that uses System.Configuration? Is the required .NET Framework version being installed (Prerequisites, setup.exe)?

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Phil Wilson

Hi Wilson,

Sorry for late reply. We are using .NET custom actions, but we are not using System.Configuration anywhere in ourcustom actions code. All the required .NETframework versions are installed on the clientmachine. It passes the prerequisites, copies the files to install dir, but after that it fails and shows the error message that I posted in my first post above.

Nadeem Ullah

You don't need to be using System.Configuration in your code. That's like saying you are not using System.Xml when in reality your code is calling a whole bunch of other .NET assemblies (Microsoft ones) that *do* call it. Without any details of what your code does it's difficult to know why it's failing. It's probably worth pointing out that an MSI install has absolutely nothing to do with .NET, and there is no .NET code running in an MSI install unless you added it.

Your Installer class (I'll assume that's what it is) is being called from an msiexec.exe process running with the local system account - this may have something to do with the error if you're thinking that this code runs just like it would if it ran with your credentials in your app's context. You should debug this in your normal way, such as catching the exception and showing the call stack.

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Phil Wilson