RELATORIO - ERRO no metodo JasperViewer.viewReport()!

Bem galera…minha aplicação está gerando relatorio…inclusive criando um arquivo PDF…mas quando executa o metodo JasperViewer.viewReport(“RelatorioSuperMarket.pdf”, false); gera uma exceção :

net.sf.jasperreports.engine.JRException: Error loading object from file : RelatorioSuperMarket.pdf

at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:92)

at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:64)

at net.sf.jasperreports.view.JRViewer.loadReport(JRViewer.java:1352)

at net.sf.jasperreports.view.JRViewer.<init>(JRViewer.java:228)

at net.sf.jasperreports.view.JRViewer.<init>(JRViewer.java:199)

at net.sf.jasperreports.view.JasperViewer.<init>(JasperViewer.java:140)

at net.sf.jasperreports.view.JasperViewer.viewReport(JasperViewer.java:397)

at net.sf.jasperreports.view.JasperViewer.viewReport(JasperViewer.java:328)

at tool.Relatorio.geraRelatorio(Relatorio.java:89)

at tool.Relatorio.main(Relatorio.java:106)

Caused by: java.io.StreamCorruptedException: invalid stream header

at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:753)

at java.io.ObjectInputStream.<init>(ObjectInputStream.java:268)

at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:87)

… 9 more

QUAL O PROBLEMA ???

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