Parent member in @Prior function

@Prior

Summary

Parent member in @Prior function

Content

I have a requirement to include parent of the calc in the @ Prior function, For example if I have parent as X and three Child as X are A(Calc),B(Input),

I have requirement for A (Calc) to look for Prior months value which is sum (A,B).

My formula will be @PRIOR(X)*(1+c(Percentage));

For some reason this is not working for me. Any suggestions will be greatly appreciated?

Thanks

GP