When the dataset has a null value in it, it throws an error (see Developer Console).
This does not happen in FusionCharts version 3.16.0
It happens in FusionCharts >= version 3.17.0
This example is using
Once the error occurs, you cannot provide a good datasource and re-render the chart.
Calling "setJSONData()" will execute without error, but the chart is in some state that you will not see the chart render.