Custom expressions

[Bob G]

Happy new year to everyone! So I'm trying out this 'custom expression' thingy that all the kids are raving about.

I've got an ability that allows the user to select a knowledge skill that is not currently a class skill, and make it a class skill. I need to find some filters, and so I found "Helper.SkCatKnow" as a tag that will select only skills that have been assigned the Knowledge category, and the field 'fieldval:skClsSkBon = 0' that will only choose skills where the class skill bonus is 0 (i.e., it's not a class skill).

So my custom expression looked like this: "Helper.SkCatKnow" & fieldval:skClsSkBon = 0

I then told the editor to select from Skills, and to restrict the first list to All Things. The resulting dropdown menu in the class tab looks like it's selecting all skills, and not filtering the way I want. Did I not create the custom expression correctly, or is my error in what I restricted the list to?