[wix-users] (deprecated) Error loading prerequisite bootstrapper application because managed host could not be loaded

I am getting Error loading prerequisite bootstrapper application because managed host could not be loaded in the logs of my custom bootstrapper. Originally I was using burn 3.9.2, and receiving error code 0x80004001. On the advice of this thread (http://tinyurl.com/pt9ym65) I tried upgrading to

[WiX-users] Bootstrapper Feature Selection

How can I provide functionality for feature-level selection in my custom bootstrapper created by burn? This link ( http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/How-to-create-a-feature-tree-with-burn-td7579948.html) seems to suggest I can do so by examining the