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java.lang.StackOverflowError: 	at java.io.ObjectStreamClass$WeakClassKey.(ObjectStreamClass.java:2307)	at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:322)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1134)	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)	at org.neuroph.util.NeurophArrayList.writeObject(NeurophArrayList.java:710)	at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:483)	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)	at org.neuroph.util.NeurophArrayList.writeObject(NeurophArrayList.java:710)	at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:483)	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)	at org.neuroph.util.NeurophArrayList.writeObject(NeurophArrayList.java:710)