 
         path.transition().duration(1500).attrTween('d', (d,i) ->
             `var i`
-            theOldDataInPie = oldPieData
+            theOldDataInPie = @oldPieData
             # Interpolate the arcs in data space
             s0 = undefined
             e0 = undefined

class Dashing.FullpieAgent extends Dashing.Widget

    @accessor 'data'

    onData: (data) ->
        #$(@node).fadeOut().fadeIn()

            .attr('alignment-baseline', 'mathematical')
            .attr('filter','url(#dropshadow)')

        @oldPieData = piedata
        return
