[rules-users] Serializing WorkingMemory Problem.

Hi All, When serializing a working memory I get the following error: Caused by: java.io.NotSerializableException: org.drools.util.AbstractHashTable$SingleIndex at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java :1081) at java.io.ObjectOutputStream.defaultWriteFields( ObjectOutputStream.java:1375) at java.io.ObjectOutputStream.writeSerialData( ObjectOutputStream.java:1347) at java.io.ObjectOutputStream.writeOrdinaryObject( ObjectOutputStream.java:1290) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java :1079) at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java :1251) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java :1075) at java.io.ObjectOutputStream.defaultWriteFields( ObjectOutputStream.java:1375) at java.io.ObjectOutputStream.writeSerialData( ObjectOutputStream.java:1347) ............ I checked the docs and org.drools.util.AbstractHashTable$SingleIndex is not serializable ... Any ideas how I can workarround this one?? Thanks! Pedro.