For starters, the action must be scheduled between InstallInitialize and InstallFinalize, and must be marked as Execute="deferred" with Impersonate set to "no". Of course, at that point, the custom action does not have direct access to the database or most session properties.
This smells like "self-registration". The recommendation is to look more deeply into ways to make your driver registration more "transparent" in order to use code that has been more deeply tested for upgrades, repairs, rollbacks, removals, patching, etc. -----Original Message----- From: Thode, Katelyn [mailto:katelyn.th...@guidancesoftware.com] Sent: Friday, July 16, 2010 8:50 AM To: General discussion for Windows Installer XML toolset. Subject: Re: [WiX-users] Custom Action not running I did look at DifxApp, but for this particular application, I feel it would be best to use the application launched from the custom action being called for reasons that I won't go into as they are specific to the particular application. Is there a way to give the custom action the necessary privilege to install drivers? -----Original Message----- From: Blair [mailto:os...@live.com] Sent: Friday, July 16, 2010 10:40 AM To: 'General discussion for Windows Installer XML toolset.' Subject: Re: [WiX-users] Custom Action not running Not sure what your logging problem would be, but I suspect that your custom action does not have the necessary privilege to install drivers. Have you looked at DifxApp? -----Original Message----- From: Thode, Katelyn [mailto:katelyn.th...@guidancesoftware.com] Sent: Friday, July 16, 2010 8:17 AM To: wix-users@lists.sourceforge.net Subject: [WiX-users] Custom Action not running I am in the process of testing my installer on different operating systems. The installer was created using 32-bit XP. Everything works as expected and the Custom Action is run. The exit dialog states that the application has been installed. When I try running the installer on 32-bit Vista, all the components get installed, but the custom action is not run. In this case, the exit dialog states that the installation ended prematurely due to an error. I tried to enable logging, but no log files were created. Any tips as to how to correctly enable logging or as to what might be causing this issue? The following is my custom action code: <!-- Install Driver Using Custom Action --> <Binary Id="loadDriver" SourceFile="MyCustomAction.dll" /> <CustomAction Id="LaunchFile" BinaryKey="loadDriver" DllEntry="wixTab1394" /> <InstallExecuteSequence> <Custom Action="LaunchFile" After="InstallFinalize">NOT Installed</Custom> </InstallExecuteSequence> This DLL launches a program that installs device drivers. As expected, on 32-bit XP, the device driver is installed, whereas on Vista the installation exits before the custom action is run. Thanks, Katelyn Note: The information contained in this message may be privileged and confidential and thus protected from disclosure. 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