Seems like there are more problems with NATURALLEFTOUTERJOIN, NATURALINNERJOIN and CROSSJOIN functions used to create calculatd table in PowerBI Desktop. When I have a relationship defined between "ItemID" columns, I get the error "The column with name ItemID already exists in 'Table' Table" but there is no such a table in the model. If I remove the relationship and even though I have "ItemID" named the same in both tables, I get the error that there are no common columns between the tables even though the documentation indicates that it will join on common column names. I tried both 1:1 and 1:* relationships. Also with Single and Both crossfilters. With CROSSJOIN with or without a relationship, I get the error that ItemID already exists. I tried both 1:1 and 1:* relationships. Also with Single and Both crossfilters. Both of my ItemID columns were whole number. I also tried as text. Same results. Can PowerBI team lookat it? It seriously deteriorating purpose of new PowerBI Feature to create calculated tables. Thanks