New Post: Absolute path

Thanks. Yes the fix only covered ManagedUI dialog scenario but not BeforeInstall.
Resolving absolute INSTALLDIR for managed events (outside of ManageUI) was scheduled at CostFinanlize and it is too late for BeforeInstall. I have changed the code to scheduled resolving absolute path before.AppSearch and it seems to address problem.

You can get the HotFix build v1.0.29.1 from NuGet

PM> Install-Package WixSharp.bin -Pre