Re: Resetting running sum based on condition

try this:

make a variable: "v_runningsum_reset" as "=if isnull(period) then 1 else 0". Perhaps you must define it with a context like "=if isnull(period in ([Store])) then 1 else 0"

then change your definition to:

=RunningSum([V_PeriodNum];([Store], [v_runningsum_reset]))

= RunningSum([No.Of Weeks];([Store], [v_runningsum_reset]))

Aufter this change, the  sum will be reseted for each store and the the changed status of filled / unfilled period

Hope that helps

Andreas