I finally found a solution by myself.
I used VectorDataset instead of XYSimpleDataset.
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Hi guys, I am using wxfreechart to create a simple 2D line chart. Everything is working fine with the first chart, but I could not find any way to "reset" the chart. So I started to delete the plot,dataset and wxChartPanel. It worked on BSD, but when I tried to do the same on Raspbian, I get a memor...