Erro quando compila

Senhores alguém pode me ajudar , quando compilo a minha class o erro abaixo ocorre:

java.io.InvalidClassException: dori.jasper.engine.base.JRBaseReport; local class incompatible: stream classdesc serialVersionUID = 503, local class serialVersionUID = 500
	at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:463)
	at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1521)
	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435)
	at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1521)
	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
	at dori.jasper.engine.util.JRLoader.loadObject(JRLoader.java:134)
	at dori.jasper.engine.JasperFillManager.fillReport(JasperFillManager.java:288)
	at dori.jasper.engine.JasperManager.fillReport(JasperManager.java:810)
	at br.com.computeasy.tiamat.utils.EtiquetaServlet.geraEtiquetaTicket7(EtiquetaServlet.java:218)
	at br.com.computeasy.tiamat.utils.EtiquetaServlet.main(EtiquetaServlet.java:278)

incompatible: stream classdesc serialVersionUID = 503,
local class serialVersionUID = 500

em sua classe voce estadeclarando, serialVersionUID = 500
e a ferramenta esta pedindo, serialVersionUID = 503

‘acho’ que é isso…
espero ter ajudado… :wink: