http://www2.sqlblog.com/blogs/marco_russo/archive/2013/02/07/first-dax-advanced-workshop-in-london-may-2013-dax-tabular-ssas.aspxAre you working with SSAS Tabular? Are you an experienced PowerPivot user? In both cases, you should be aware that there is only one skill that is important for PowerPivot and SSAS Tabular, and it is the DAX language. I and Alberto have been using DAXenCommunityServer 2.1 SP2 (Build: 61129.1)