Use Memory Table in Measure

Hello,

I would like to refer a Field from a table that is stored in a Variable within a next statement.

Basically something like this (this example doesn't make sense but it is a preparation for a larger statement.

The final goal is to realize somethign dynamic like in this post https://community.powerbi.com/t5/Desktop/Filtering-and-Ranking/m-p/193043#M84959

But I I could already realize this i'm on the good path ..

I'm getting the error "Table variable 'FirstRowWithMaxRatioByLoc' cannot be used in current context because a base table is expected."

Measure = 
VAR MaxRatioByLoc = SUMMARIZE(Sheet2,[Location],"MaxOoOByLoc",MAX(Sheet2[Ratio]))
VAR FirstRowWithMaxRatioByLoc = NATURALINNERJOIN(MaxRatioByLoc, Sheet2)
RETURN MAX(FirstRowWithMaxRatioByLoc[MaxOoOByLoc])