NullPointerException at net.sf.jasperreports.engine.fill.JRFillBreak.prepare

[renanregis]

I'm having this when I try to put a break element inside a list

net.sf.jasperreports.engine.JRException: java.lang.NullPointerException
	at com.jaspersoft.studio.editor.preview.view.control.ReportControler.fillReport(ReportControler.java:530)
	at com.jaspersoft.studio.editor.preview.view.control.ReportControler.access$20(ReportControler.java:505)
	at com.jaspersoft.studio.editor.preview.view.control.ReportControler$5.run(ReportControler.java:386)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: java.lang.NullPointerException
	at net.sf.jasperreports.engine.fill.JRFillBreak.prepare(JRFillBreak.java:218)
	at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:536)
	at net.sf.jasperreports.engine.fill.JRFillFrame.prepare(JRFillFrame.java:241)
	at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:536)
	at net.sf.jasperreports.components.list.FillListContents.prepare(FillListContents.java:92)
	at net.sf.jasperreports.components.list.VerticalFillList.fillContents(VerticalFillList.java:164)
	at net.sf.jasperreports.components.list.VerticalFillList.prepare(VerticalFillList.java:111)
	at net.sf.jasperreports.engine.fill.JRFillComponentElement.prepare(JRFillComponentElement.java:152)
	at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:536)
	at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:411)
	at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:386)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2056)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:748)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:255)
	at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:115)
	at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:580)
	at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFill.run(BaseFillHandle.java:123)
	at java.lang.Thread.run(Thread.java:745)

[teodord]

The problem comes from the fact that the behaviour of the break elements depends on the state of the containing band. For example, a page break would be inhibited if it is the first element in the first band that renders on the page.
And when the break element is placed in a list component, the notion of band is no longer that clear.
May I ask what you want to achieve with a break in the list component? Maybe some other technique could be used instead.

[afreuDev]

Hello,
Can you explain more about "other technique" please ?
Thx in advance !

[teodord]

In order to provide any workaround, we first need to understand what you are trying to achieve. So it is you that need to provide more details first.

[froilanmmedina]

In my case what I am trying to do is print a set of tables. But with the requirement of when one table ends the next you must start on the next page.

note: I put the page break inside the list at the end of a crosstab that I have.