Sequencing VDB project causes NullPointerException

2012-03-05 14:49:31,124 ERROR [org.modeshape.repository.sequencer.SequencingService (modeshape-1-thread-9) Problem(s) while sequencer Teiid VDB Sequencer is sequencing node default=></{}files/{}oracle_func/{}func.vdb/{http://www.jcp.org/jcr/1.0}content && [{http://www.modeshape.org/1.0}uuid = 2ee08b6a-54a9-4efb-8833-6a71ab437c25]>
2012-03-05 14:49:33,061 ERROR [org.modeshape.repository.sequencer.SequencingService] (modeshape-1-thread-9) Error reading VDB file "/files/oracle_func/func.vdb/jcr:content": null
2012-03-05 14:49:33,795 ERROR [org.modeshape.repository.sequencer.SequencingService] (modeshape-1-thread-10) Error while sequencer Teiid Model Sequencer is sequencing node default=></{}files/{}oracle_func/{}oraclev.xmi/{http://www.jcp.org/jcr/1.0}content && [{http://www.modeshape.org/1.0}uuid = eb45d45a-a977-49ec-ac53-00b31627b4a4]>
org.modeshape.repository.sequencer.SequencerException: java.lang.NullPointerException
	at org.modeshape.repository.sequencer.StreamSequencerAdapter.execute(StreamSequencerAdapter.java:198)
	at org.modeshape.repository.sequencer.SequencingService.processChange(SequencingService.java:498)
	at org.modeshape.repository.sequencer.SequencingService$RepositoryObserver$1.run(SequencingService.java:666)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(UnknownSource)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(UnknownSource)
	at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException
	at org.modeshape.sequencer.teiid.XmiGraphReader.references(XmiGraphReader.java:459)
	at org.modeshape.sequencer.teiid.XmiModelReader$AnnotationHandler.process(XmiModelReader.java:723)
	at org.modeshape.sequencer.teiid.XmiModelReader.processObject(XmiModelReader.java:373)
	at org.modeshape.sequencer.teiid.XmiModelReader.writePhase1(XmiModelReader.java:227)
	at org.modeshape.sequencer.teiid.XmiModelReader.write(XmiModelReader.java:186)
	at org.modeshape.sequencer.teiid.ModelSequencer.sequence(ModelSequencer.java:149)
	at org.modeshape.repository.sequencer.StreamSequencerAdapter.execute(StreamSequencerAdapter.java:180)
	... 5 more