As a matter of fact, I succeeded yesterday. Unfortunately, I’m not sure what all has changed. I think I was dealing with some form of file corruption owing to sub-projects and trying to do it with files on a SharePoint server. Yesterday I tried adding a pool that was NOT a subproject with all files on my local drive and that worked. I then tried it again with the file as a sub-project and that worked too. One hiccup was that pool must be open to add it, that means if it’s a sub-project it’s disclosure triangle must be turned in order to force it open. Lemme know if any of that works.