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False alert, it was my error as suspected...
I had a wrong mapping (mapDatasetToRangeAxis) hence it was giving the NPE.

apologies
stelios

here is the stacktrace: I'll try to make a dame asap. Exception in thread "AWT-EventQueue-13" java.lang.NullPointerException at org.jfree.chart.renderer.xy.XYLineAndShapeRenderer.drawPrimaryLine(XYLineAndShapeRenderer.java:879) at org.jfree.chart.renderer.xy.XYLineAndShapeRenderer.drawItem(XYLineAnd...

ok I now have the demo (the one that runs locally) and the "real" app (the one which the plot gets serialized/deserialized) to be exactly the same, same number and types of combinedPlot, subplot, datasets, range etc. The only difference being the size of the series and the modCount of the subplot Ar...

Hi, I get a nullPointerException on trying to draw a CombinedDomainXYPlot with a subplot of type: XYPlot, 2 datasets type: TimeSeriesCollection 1 Range Axis type: NumberAxis I've succesfuly drawn multiple series with shared RangeAxis with the same setup as above, the only differences being: XYSeries...

Hi, Has anyone any ideas of how to add multiline support to the XYTextAnnotation class? I really need it and looking for some way to do it. Unfortunately I haven't come up with anything yet. There are some posts in the forum referring to this issue but no solutions... Any suggestions appreciated tha...

sorry for the many posts..
Is there any advantage on adding the annotation on the renderer instead of the plot. Both seem to work fine, is the only difference the event they fire?

Can't believe I didn't see that, its clear enough in any case... btw I noticed in the XYTextAnnotation if you put a carriage return it does have effect but you can't see the line that goes under. Is there any standard way to overcome this, do I need to override the XYTextAnnotation class? thanks ste...

Hi, I have a problem deleting annotations that I've added on a LineAndShape or Step renderer. plot.clearAnnotations() works fine for annotations added with the plot.addAnnotation(annotation) method. When added with renderer.addAnnotation(annotation) method calling clearAnnotations on the plot does n...

Any suggestions how to implement this? I read in the other post

Have a look at autoRangeBoth() in ChartPanel

Couldn't find that anywhere.
Any ideas of the logic to do this?

thanks

Just in case anyone stumbles on this post and wonder about the solution.

The problem was with swing and threads, nothing to do with freechart.
Although the Exception was totally misguiding.

How did you manage to resolve this?

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