Embedding a MappedSuperClass in another MappedSuperClass

[Ofir Tam]

hi,
I have a problem embedding a MappedSuperClass in another MappedSuperClass.
I want my entity to have it's super class member (which is abstract).
I get some null pointer exception in 
org.apache.openjpa.kernel.BrokerImpl.embed(BrokerImpl.java:2681)
I have openjpa-1.2.1
I was wondering how can I achieve this structure:

@MappedSuperClass
abstract BaseClass1 {
  @Embeded
  BaseClass2 member;
}

@MappedSuperClass
abstract BaseClass2{
  @Base
  Something
}

@Entity
Class1 extends BaseClass1

@Embedable
Class2 extends BaseClass2‎