Hi Narcis

I don't understand your response. I'm not altering any source code simply
attempting to use the existing TPolygonSeries which is a valid TChart series and iherited from TChartSeries ?? Surely you shold be able to use this series?

Rgds

I am wanting to use the TPolygonSeries, used by TMapSeries. I am getting an access violation error when assigning to the chart yet the parent chart series TChartSeries will assign fine. What is the problem. PS I don't want to use the TMapSeries as I wish to inherit from TPolygonSeries and add my own...