Question on method based multiplier

Hi,

I now I can do simple calculations such as 1-PCON in a method based multiplier. I also now that in MS I can do more complex calculations like 1-(Py/Px), Py and Px being two accounts in my ownership model.

However when I try 1-(Py/Px) in BPC 10 NW it generates an error on consolidation. The error says this kind of formula is not supported. I also tried with square brackets (1-([Py]/[Px]) which got me the same error.

Does anyone know if such a calculation is possible?

Thanks,

Arnold