java.lang.NullPointerException: Cannot invoke "net.sf.jasperreports.engine.fill.JRFillBand.isPageBreakInhibited()" because the return value of "net.sf.jasperreports.engine.fill.JRFillSubreport.getBand()" is null at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.FillerSubreportParent.isPageBreakInhibited(FillerSubreportParent.java:117) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRFillBand.isPageBreakInhibited(JRFillBand.java:604) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRFillBreak.prepare(JRFillBreak.java:218) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:542) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:453) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:428) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2616) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:837) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:276) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:119) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:623) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.BaseReportFiller.fill(BaseReportFiller.java:434) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRFillSubreport.fillSubreport(JRFillSubreport.java:830) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.JRSubreportRunnable.run(JRSubreportRunnable.java:61) at jasperreports@6.20.3/net.sf.jasperreports.engine.fill.AbstractThreadSubreportRunner.run(AbstractThreadSubreportRunner.java:221) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:833)
