Apparently @nage is a virtual attribute. I don't know what a virtual attribute is. But i guess that means its an attribute that isn't shown in the spreadsheet.
I'm confused about pop attributes. The docs show @nage as an attribute however it does not show up in the Geometry section of the popobject in the geometry spreadsheet. Apparently in pops @attrib calls effect node properties that effect the sim and not geometry attribs. however may attribs are shown in the geometry spreadsheet. But not @nage. is there are reason for this? or is there another way to see the values of @nage.