Hey, I am using Wix COMPlus extension to register my complus application, here is the code: <Component Id="Test.dll" Guid="<MyGUID>" Win64="yes" DiskId="1"> <File Id="Test.dll" ShortName="TST.dll" Source="<PATH>" KeyPath="yes"> <Class Description="TEST Class" Id="<ClassGUID>" Context="InprocServer32" ThreadingModel="both" Programmable="yes" /> </File> <complus:ComPlusApplication Id="Test" Name="Test Server" Activation="inproc" Description="Test Server Components"> <complus:ComPlusAssembly Id="TestAssem" Type="native" DllPath="[#Test.dll]"> <complus:ComPlusComponent Id="Test" CLSID="<ClassGUID>" Transaction="required" Description="Test"> </complus:ComPlusComponent> </complus:ComPlusAssembly> </complus:ComPlusApplication> </Component> and Here is the MSI log: ComPlusInstallExecute: Entering ComPlusInstallExecute in C:\WINDOWS\Installer\MSI342.tmp, version 3.5.2519.0 ComPlusInstallExecute: Creating application, key: Test ComPlusInstallExecute: 1 changes saved to catalog, key: Test ComPlusInstallExecute: Registering assembly, key: TestAssem ComPlusInstallExecute: Error 0x80004005: Failed to install components ComPlusInstallExecute: Error 0x80004005: Failed to register native assembly ComPlusInstallExecute: Error 0x80004005: Failed to register assembly, key: TestAssem ComPlusInstallExecute: Error 0x80004005: Failed to register assemblies CustomAction ComPlusInstallExecute_64 returned actual error code 1603 (note this may not be 100% accurate Any suggestion on how to fix this ? ThanksXin Guo ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users