I've tried entering the name of the sensor as I would a variable, but it won't accept it. I see that Solidworks sensors, ie "SW-Mass", can be used successfully in an equation, but I can't get my own sensors to work in an equation. SW 2012x64

What I want to do is create a constraint in an optimization design study which is the sum of two sensors. Stress_range = 'sensor'P1max(feature) - 'sensor'P3min(feature). This is not the same thing as the sensor 'INT: Stress Intensity(P1-P3)' because that is for each element - I need it for the feature.