Hello! I try to make a graphic with Jasperrepport but i've got this message: net.sf.jasperreports.engine.JRException: java.lang.NullPointerException at com.jaspersoft.studio.editor.preview.view.control.ReportController.fillReport(ReportController.java:551) at com.jaspersoft.studio.editor.preview.view.control.ReportController.access$18(ReportController.java:526) at com.jaspersoft.studio.editor.preview.view.control.ReportController$1.run(ReportController.java:444) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.lang.NullPointerException at net.sf.jasperreports.charts.fill.JRFillPieDataset.getCustomDataset(JRFillPieDataset.java:261) at net.sf.jasperreports.engine.fill.JRFillChartDataset.getDataset(JRFillChartDataset.java:54) at net.sf.jasperreports.engine.fill.JRFillChart$FillChartContext.getDataset(JRFillChart.java:1500) at net.sf.jasperreports.engine.fill.DefaultChartTheme.getDataset(DefaultChartTheme.java:261) at net.sf.jasperreports.engine.fill.DefaultChartTheme.createPieChart(DefaultChartTheme.java:1194) at net.sf.jasperreports.engine.fill.DefaultChartTheme.createChart(DefaultChartTheme.java:358) at net.sf.jasperreports.engine.fill.JRFillChart.evaluateChart(JRFillChart.java:845) at net.sf.jasperreports.engine.fill.JRFillChart.evaluateRenderer(JRFillChart.java:798) at net.sf.jasperreports.engine.fill.JRFillChart.resolveElement(JRFillChart.java:1406) at net.sf.jasperreports.engine.fill.JRFillElement.performDelayedEvaluation(JRFillElement.java:1136) at net.sf.jasperreports.engine.fill.JRFillElement.resolveElement(JRFillElement.java:1238) at net.sf.jasperreports.engine.fill.ElementEvaluationAction.execute(ElementEvaluationAction.java:69) at net.sf.jasperreports.engine.fill.DelayedFillActions.runActions(DelayedFillActions.java:271) at net.sf.jasperreports.engine.fill.BaseReportFiller.resolveBoundElements(BaseReportFiller.java:807) at net.sf.jasperreports.engine.fill.JRBaseFiller.resolveReportBoundElements(JRBaseFiller.java:1202) at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillSummary(JRVerticalFiller.java:1223) at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportEnd(JRVerticalFiller.java:297) at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:117) at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:615) at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFill.run(BaseFillHandle.java:135) at java.lang.Thread.run(Thread.java:748) how can i resolve that? Thanks
