For community reference... If you ever run into a case where you have a set width on a columnChart and for some reason the stacked bars do not show up, even though the axis shows and the legend show, then check out the width of the string supplying the CategoryAxis categoryField property (label on the stacked bar axis). I found that if the label is too long for the chart space, then everything disappears (and it looks like the chart is squashed up on the right side). Once I trim the string to a maximum size, then the bars return.
