Update newly created object failed.Exception show that the object's version is not in memory.
Object's version is using a field in class.

[java] 23:58:58,170 (main) DEBUG [JPOX.Persistence] - The Implementation creator org.jpox.enhancer.asm.ASMImplementationCreator is ready for use.
     [java] 23:58:58,170 (main) DEBUG [JPOX.Persistence] - Object Manager "org.jpox.ObjectManagerImpl@ed662d" opened for datastore "org.jpox.store.rdbms.RDBMSManager@1275d39"
     [java] 23:58:58,210 (main) DEBUG [JPOX.Persistence] - Making object persistent : "org.jpox.test.B@5b0668"
     [java] 23:58:58,320 (main) DEBUG [JPOX.Persistence] - Object "org.jpox.test.B@5b0668" has been marked for persistence but its actual persistence to the datastore will be delayed due to use of optimistic transactions or "delayDatastoreOperationsUntilCommit"
     [java] 23:58:58,400 (main) DEBUG [JPOX.Persistence] - ObjectManager internalFlush() process started - 1 dirty objects
     [java] 23:58:58,410 (main) DEBUG [JPOX.Persistence] - Object "org.jpox.test.B@5b0668" being inserted into table "b"
     [java] 23:58:59,371 (main) DEBUG [JPOX.Datastore.Persist] - INSERT INTO b ("version","name") VALUES (<1>,<'b0'>)
     [java] 23:58:59,472 (main) DEBUG [JPOX.Datastore.Persist] - Execution Time = 101 ms (number of rows = 1)
     [java] 23:58:59,472 (main) DEBUG [JPOX.Datastore.Retrieve] - SELECT currval('b_oid_seq')
     [java] 23:58:59,472 (main) DEBUG [JPOX.Datastore.Retrieve] - Execution Time = 0 ms
     [java] 23:58:59,472 (main) DEBUG [JPOX.Datastore.Persist] - Object "org.jpox.test.B@5b0668" was inserted in the datastore and was given strategy value of "8"
     [java] 23:58:59,502 (main) DEBUG [JPOX.Persistence] - Insert of object "org.jpox.test.B@5b0668" is calling postInsert for field "org.jpox.test.B.cList"
     [java] 23:58:59,532 (main) DEBUG [JPOX.Persistence] - Object "org.jpox.test.B@5b0668" field "cList" is replaced by a SCO wrapper of type "org.jpox.sco.ArrayList" [cache-values=true, lazy-loading=true, queued-operations=true, allow-nulls=false]
     [java] 23:58:59,532 (main) DEBUG [JPOX.Persistence] - ObjectManager internalFlush() process finished
     [java] 23:58:59,542 (main) DEBUG [JPOX.Persistence] - Object "org.jpox.test.B@5b0668" field "cList" loading contents to SCO wrapper from the datastore
     [java] 23:58:59,932 (main) DEBUG [JPOX.Datastore.Retrieve] - SELECT 'org.jpox.test.C' AS JPOXMETADATA,"element"."name","element".oid,"element"."version",this.integer_idx AS JPOXORDER0 FROM b_clist this INNER JOIN "c" "element" ON "element".oid = this.c_oid WHERE <8> = this.b_oid AND this.integer_idx >= <0> ORDER BY JPOXORDER0
     [java] 23:58:59,932 (main) DEBUG [JPOX.Datastore.Retrieve] - Execution Time = 0 ms
     [java] 23:59:00,022 (main) DEBUG [JPOX.Persistence] - ObjectManager internalFlush() process started - 0 dirty objects
     [java] 23:59:00,022 (main) DEBUG [JPOX.Persistence] - ObjectManager internalFlush() process finished
     [java] 23:59:00,223 (main) DEBUG [JPOX.Datastore.Retrieve] - SELECT 1 FROM b THIS WHERE (THIS.oid = <8>)
     [java] 23:59:00,233 (main) DEBUG [JPOX.Datastore.Retrieve] - Execution Time = 10 ms
     [java] 23:59:00,233 (main) DEBUG [JPOX.Persistence] - Making object persistent : "org.jpox.test.B@5b0668"
     [java] 23:59:00,233 (main) DEBUG [JPOX.Persistence] - Making object persistent : "org.jpox.test.C@2db19d"
     [java] 23:59:00,233 (main) DEBUG [JPOX.Persistence] - Object "org.jpox.test.C@2db19d" has been marked for persistence but its actual persistence to the datastore will be delayed due to use of optimistic transactions or "delayDatastoreOperationsUntilCommit"
     [java] 23:59:00,303 (main) DEBUG [JPOX.Persistence] - ObjectManager internalFlush() process started - 2 dirty objects
     [java] 23:59:00,303 (main) DEBUG [JPOX.Persistence] - Object "org.jpox.test.B@5b0668" having fields "version" updated in table "b"
     [java] 23:59:00,313 (main) ERROR [JPOX.Persistence] - Object with id "org.jpox.test.B$OID::8" in table b has no version set on the object in memory and you want to update it!! Please report this bug to the developers of JPOX
     [java] 23:59:00,313 (main) DEBUG [JPOX.Persistence] - ObjectManager internalFlush() process finished
     [java] 23:59:00,313 (main) DEBUG [JPOX.Persistence] - Disconnecting org.jpox.test.C@2db19d from JDOStateManagerImpl[pc=org.jpox.test.C@2db19d, lifecycle=P_NEW]

// Create B
tx.begin();
B b0 = new B("b0");
pm.makePersistent(b0);
tx.commit();

// add C to B
tx.begin();
b0 = (B)pm.getObjectById(JDOHelper.getObjectId(b0));

//pm.refresh(b0); // Workaround: Using refresh so b0 can get version
C c0 = new C("c0");
b0.cList.add(c0);
pm.makePersistent(b0);
tx.commit();