Hi @rwachend Yes - if those output ports aren't connected to anything then those attribute values won't get calculated.

@rwachend Just to add to @danatsafe ' comment. Make sure you have Feature Caching OFF. If you have feature caching turned on, the data will be saved for the Complete and Cumulative outputs - so you can inspect them

One other tip -- if you do want feature caching for the rest of your workflow but just don't want to pay the price for the StatsCalc's Complete/Cumulative, we don't provide a direct user interface to turn it off. However...if you put your StatisticsCalculator transformer inside a bookmark (it can be the only thing), and then connect only the output port you want to something outside the bookmark, and then...collapse the bookmark..you'll get what you want. Feature caching does not happen inside collapsed bookmarks. Only flows leaving a bookmark get cached. Hope this helps.

Thanks @fmelizard excellent tip. though being able to turn it off in the transformer would be great