On one of our test servers I received the following message when attempting to build the SalesLogix web platform on a v7.5.3 system with Hot Fixes 1 through 4.
An application Exception has occurred.
Failed to build Sage.Integration.Entity.Feeds.dll. (Sage.Platform.Orm.CodeGen).
What finally fixed the issue was a complete uninstall and reinstall. Then a pack and rebuild and deployment after applying service pack 3 and a complete build and deployment after each hot fix. We were adding the hot fixes and the hot fix bundles and then rebuilding and deploying but the system apparently needs to the rebuild and deployment at each level to set the correct base.