Custom Action - Error 1001: Could not find file myApp.InstallState

Question

I have tried to create a custom action for a Visual Studio Installer project to modify the permissions for a config file.

The Installer.cs is as follows:

Answer 1

You can find a solution here

To quote:

The problem is that the MSI infrastructure is looking for the installation state file which is usually created during the Install phase. If the custom action does not participate in the Install phase, no file is created.

The solution is to add the custom action to both the Install and the Commit phases, although it does nothing during the install phase.