Hi all
Im trying code posted in this url:

Code
when i execute it i get the following error messages

It buils report with detail from an arraylist


Code:
Exception in thread "main" net.sf.jasperreports.engine.JRException: Error loading object from file : D:\PruebaJasper\RelAlunosDisciplinas.jrxml
        at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:92)
        at net.sf.jasperreports.engine.util.JRLoader.loadObjectFromLocation(JRLoader.java:257)
        at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateSubreport(JRFillSubreport.java:311)
        at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubreport.java:260)
        at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:274)
        at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:403)
        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:1346)
        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:662)
        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:232)
        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:113)
        at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:763)
        at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:688)
        at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:89)
        at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:601)
        at com.GeraRelatorio.<init>(GeraRelatorio.java:36)
        at com.GeraRelatorio.main(GeraRelatorio.java:42)
Caused by: java.io.StreamCorruptedException: invalid stream header
        at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:763)
        at java.io.ObjectInputStream.<init>(ObjectInputStream.java:278)
        at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:87)
        ... 15 more
Java Result: 1





Any Help????? Plz