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Cannot invoke JRFillBand.isPageBreakInhibited() because the return value of JRFillSubreport.getBand() is null


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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)

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Hello,

Per error trace, it looks like isSplitTypePreventInhibited is called on null. Seems to happen when a table is located in a detail band and the cell of the table is overflowing, that is generating a page break.

Found similar error on below community portal.

https://community.jaspersoft.com/jasperreports-library/issues/10451

Hope this finds you useful !!

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