'ClassValuePicker in Weka KnowledgeFlow doesn't seem to let you pick a class

Does anyone have any insight? New to using Weka KnowledgeFlow but I've followed the official documentation to a t.

I'm trying to generate multiple ROC plots, which is fine except Weka is choosing the wrong class as the positive class. The instructions say to include the ClassValuePicker in your process, but the drop down menu in ClassValuePicker is doing something very strange. It's not giving me class value options, but instead looks like this:

You can see that the drop down menu includes a lot of strange options.

It's glitchy all around and it won't let me edit anything manually. Has anyone else had this problem? The ArffLoader and ClassAssigner seem to be working fine.

machine-learningstatisticsclassificationweka


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