Essbase Array Variable - New Use Case!

@LEVMBRS(Time

I'm trying to define a few variables in a member formula. I keep getting code: Error(1200337). Does anyone know if there is a limit on member formula's that prevents you from declaring variables and arrays within them? The admin manual talks about using arrays specifically with member formulas, but perhaps that is to be interpreted as strictly within a calc script. Here's an example
VAR Xnull;
VAR X;

ARRAY Xi [Time];

FIX(@LEVMBRS(Time, 0))

... some code

ENDFIX;


Thank you

Patrick