There appears to be a bug with using a showDataEffect with a stacked column chart.
I have a column chart with a showDataEffect set to SeriesInterpolate. It works fine with a single data series or if clustered, but if I changed the type to stacked or 100%, it fails while rendering the effect. It fails in the filterCache method of NumericAxis which is called a few layers down from the effect play method. The problem being that the cache is null. Changing the effect to SeriesZoom gave the same result. I've added code that sets the showDataEffect to null when the type gets changed to stacked or 100% which keeps thing from blowing up, but I'd love to have the effect for the stacked charts.
