PDF 변환시 오류가 아래와 같은 에러문구가 나와서 문의드립니다

java.lang.NullPointerException: Cannot invoke "java.lang.Double.doubleValue()" because "<local8>" is null] with root cause

java.lang.NullPointerException: Cannot invoke "java.lang.Double.doubleValue()" because "<local8>" is null

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.models.function.f.matrixX(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.models.linearRegression.b.a(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.models.linearRegression.a.<init>(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.models.linearRegression.b.<init>(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.models.trendline.functional.f.a(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.models.trendline.functional.c.b(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.views.itemView.functional.a.f(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.views.itemView.functional.a.initialize(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.views.c.g(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.overlays.trendline.base.views.c.useData(Unknown Source)

at com.grapecity.datavisualization.chart.component.plot.views.plot.a.h(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.plots._base.views.plot.a.h(Unknown Source)

at com.grapecity.datavisualization.chart.component.plot.views.plot.a._layoutData(Unknown Source)

at com.grapecity.datavisualization.chart.component.core.models.coordinateSystem.views.a._layoutData(Unknown Source)

at com.grapecity.datavisualization.chart.cartesian.plugins.coordinateSystems.__base.views.coordinateSystem.a._layoutData(Unknown Source)

at com.grapecity.datavisualization.chart.component.layout.buildin.plots.views.a._layoutData(Unknown Source)

at com.grapecity.datavisualization.chart.component.plotArea.views.a._layoutData(Unknown Source)

at com.grapecity.datavisualization.chart.component.dv.views.dv.a._layoutData(Unknown Source)

at com.grapecity.datavisualization.chart.component.core.FlexDV.a(Unknown Source)

at com.grapecity.datavisualization.chart.component.core.FlexDV.<init>(Unknown Source)

at com.grapecity.datavisualization.chart.component.core.FlexDV.<init>(Unknown Source)

at com.grapecity.documents.excel.s.i.a(Unknown Source)

at com.grapecity.documents.excel.s.d.a(Unknown Source)

at com.grapecity.documents.excel.s.i.a(Unknown Source)

at com.grapecity.documents.excel.s.d.a(Unknown Source)

at com.grapecity.documents.excel.s.i.a(Unknown Source)

at com.grapecity.documents.excel.s.d.a(Unknown Source)

at com.grapecity.documents.excel.s.i.a(Unknown Source)

at com.grapecity.documents.excel.s.d.a(Unknown Source)

at com.grapecity.documents.excel.s.i.a(Unknown Source)

at com.grapecity.documents.excel.s.d.a(Unknown Source)

at com.grapecity.documents.excel.H.aG.a(Unknown Source)

at com.grapecity.documents.excel.s.l.a(Unknown Source)

at com.grapecity.documents.excel.s.l.a(Unknown Source)

at com.grapecity.documents.excel.bw.a(Unknown Source)

at com.grapecity.documents.excel.bw.a(Unknown Source)

at com.grapecity.documents.excel.Workbook.a(Unknown Source)

at com.grapecity.documents.excel.Workbook.b(Unknown Source)

at com.grapecity.documents.excel.Workbook.save(Unknown Source)

관련 자료 같이 첨부드립니다

감사합니다