creating a "stack effectif" statistic

[focon]

Helo everyone,

I try to fin out how to create a "stack effective" statistic in poker traker for tournament.
in configure=>statistic i create a new stats but in value expression i have always the same message "invalid value expression"
and i can't continue.
Is anyone can give me a method on how to proceed ? I will be very happy

[Flag_Hippo]

Have you created the required custom columns? This post has an example of creating these types of statistics.