In my data model in Power Pivot, I added some calculated columns (such as string concatenation). Use these columns calculated as dimensions in a Pivot Table. When I transfer the file in PowerBI for Office365 and I try to update the data with the Data Management Gateway, the procedure should never be successful.
Eliminating these columns, everything works.
Can you help me understand why.

Gianluca,

So it seems that DMG doesn't support the calculated columns?

Thanks!