Aggregation Tables: Summarization Type "Count" and "Count Table Rows" are inactive

[isabel_vasco]

Hello everyone! 

I'm working on the Mixed Storage mode PowerBI report where the detailed table is in the Direct Query mode and aggregation table is in the Import mode. For both tables I pull the data using SQL query. 

Detailed and Aggregated tables have UserID as a varchar data type, I count them using COUNT(DISTINCT USERID). When I try to manage aggregations, the summarization type Count is not active. 

Also I add to my SQL query COUNT(*) AS NB_ROWS for both tables, but the summarization type "Count Table Rows" is not active. 

How can I activate both summariozation types to manage aggregations?

Thank you!