problema al hacer el Jar

[KM_KaMiKaCe]

solucionado lo anterior, me da este problema:

Exception occurred during event dispatching:
java.lang.StackOverflowError
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java :55)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknow n Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java :262)
at java.beans.Statement.invokeInternal(Statement.java :257)
at java.beans.Statement.access$000(Statement.java:56)
at java.beans.Statement$2.run(Statement.java:158)
at java.security.AccessController.doPrivileged(Native Method)
at java.beans.Statement.invoke(Statement.java:154)
at java.beans.Expression.getValue(Expression.java:115 )
at java.beans.DefaultPersistenceDelegate.doProperty(D efaultPersistenceDelegate.java:227)
at java.beans.DefaultPersistenceDelegate.initBean(Def aultPersistenceDelegate.java:264)
at java.beans.DefaultPersistenceDelegate.initialize(D efaultPersistenceDelegate.java:408)
at java.beans.PersistenceDelegate.writeObject(Persist enceDelegate.java:116)
at java.beans.Encoder.writeObject(Encoder.java:74)
at java.beans.XMLEncoder.writeObject(XMLEncoder.java: 274)
at java.beans.Encoder.writeExpression(Encoder.java:30 4)
at java.beans.XMLEncoder.writeExpression(XMLEncoder.j ava:389)
at java.beans.DefaultPersistenceDelegate.doProperty(D efaultPersistenceDelegate.java:229)
at java.beans.DefaultPersistenceDelegate.initBean(Def aultPersistenceDelegate.java:264)
at java.beans.DefaultPersistenceDelegate.initialize(D efaultPersistenceDelegate.java:408)
at java.beans.PersistenceDelegate.writeObject(Persist enceDelegate.java:116)
at java.beans.Encoder.writeObject(Encoder.java:74)
at java.beans.XMLEncoder.writeObject(XMLEncoder.java: 274)
at java.beans.Encoder.writeExpression(Encoder.java:30 4)
at java.beans.XMLEncoder.writeExpression(XMLEncoder.j ava:389)
at java.beans.DefaultPersistenceDelegate.doProperty(D efaultPersistenceDelegate.java:229)
at java.beans.DefaultPersistenceDelegate.initBean(Def aultPersistenceDelegate.java:264)
at java.beans.DefaultPersistenceDelegate.initialize(D efaultPersistenceDelegate.java:408)
at java.beans.PersistenceDelegate.writeObject(Persist enceDelegate.java:116)
at java.beans.Encoder.writeObject(Encoder.java:74)
........

siguen muchas lineas.

Alguien sabe como solucionarlo, o de que puede ser?

un saludo y mil gracias!