@UE_FlavienP Thank you for your reply. Not entirely sure what was happening here. I had just updated visual studio to 17.4.2 prior to pulling and building UE5.1. When I look at the solution file/configuration manager I can clearly see that DatasmithRevit2020 is not set to build however when selecting the Development Editor config and building the solution all of the Datasmith API projects were attempting to build resulting in numerous failures. When selecting only the projects that are set to build I was able to build UE5.1. Hopefully this doesn’t repeat after repairing visual studio.