I think I found a bug in the latest CTP. I copied an existing cube, dsv, and underlying database and renamed them all. I added new columns to the copied fact table and created new measures, updated the new DSV, and new cube. Now every new measure creates a cube processing error:
Errors in the high-level relational engine. The data source view does not contain a definition for the 'Account_Total_Amount_Due' column in the 'dbo_Fact_Claims' table or view.
Everything is pointed to the right database and DSV. I checked the XML in the DSV and it in fact "contains a definition" for all the new measures. Any ideas on this?