I have the following scenario:
class A{
List<B> listB;
C objC;
}
class C{
B objB; //References 'B'
}
class B{
}

Mapping:
<hibernate-mapping>
<class name="A" table="A">
<bag name="listB" table="AB" cascade="all,delete-orphan">
<key column="AId"/>
<many-to-many class="B" column="BId" unique="true"/>
</bag>
<many-to-one name="objC" column="CId" unique="true" not-null="false" cascade="all"/>
</class>
<class name="B" table="B">
</class>
<class name="C" table="C">
<many-to-one name="objB" class="B" column="BId" not-null="true" unique="true" />
</class>
</hibernate-mapping>

Now I have following code.
A objA = new A();
B objB = new B();
C objC = new C();
objA.listB.add(objB);
objA.objC = objC;
objC.objB = objB;
save(objA);// Get not-null property references a null or transient value: C.objB

Why am I getting this exception? Why can't hibernate store both objB and objC together?

Specify "cascade" everywhere or save objects manually in reverse order.