question on alternate states/addmonths in Year over Year calc

[gerrycastellino]

having a problem with my syntax below.

My default state is where I have the most recent month selected - see image.

I'm trying to go back 12 months to  grab a value from a year ago from my default state.

I have the below expr linked to alternate state which is not working.

=sum({< %Snapshot_Date = {"$(=addmonths($::%Snapshot_Date,-12,1))"} >} Headcount) 

What am I missing ?

Thankx !

Gerry.

[gerrycastellino]

yes absolutely !

thankx so much for all your do !