Set useLegacyV2RuntimeActivationPolicy to true in your custom action config file:
<startup useLegacyV2RuntimeActivationPolicy="true"> <supportedRuntime version="v4.0" /> </startup> http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/WiX-3-5-C-Custom-Action-Project-tp5320937p5320937.html I am unable to get the level of logging you posted. Can you explain how you got this log? Ryan -- View this message in context: http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/wix-Bugs-3019443-NET-Custom-Action-fails-on-FW-4-0-tp5642116p5651372.html Sent from the wix-devs mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev _______________________________________________ WiX-devs mailing list WiX-devs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-devs