Office Connector throwing NPE when ppt file contains tables

2014-08-21 08:35:50,531 WARN [http-bio-8090-exec-5] [com.benryan.conversion.PPTSlideServlet] doGet Conversion task timed out for attachment : testpowerpoint.pptx with page number 0, waited : 300, now executing in background.
- referer: https://testsite/display/HOME/July+23rd%2C+2014 | url: /plugins/servlet/pptslide | userName: admin
2014-08-21 08:35:50,849 ERROR [DefaultSlideCacheManager:thread-2] [com.benryan.conversion.AbstractSlideConversionTask] call problem while converting testpowerpoint.pptx
- url: /plugins/servlet/pptslide | userName: anonymous | referer: https://testsite/display/HOME/July+23rd%2C+2014
java.lang.NullPointerException
at com.benryan.pptx.record.AbstractSingleShape.getPredefinedShape(AbstractSingleShape.java:169)
at com.benryan.escher.EscherRenderer.renderAutoshape(EscherRenderer.java:565)
at com.benryan.escher.EscherRenderer.walkShapes(EscherRenderer.java:233)
at com.benryan.escher.EscherRenderer.walkShapes(EscherRenderer.java:252)
at com.benryan.ppt.PptRenderer.render(PptRenderer.java:125)
at com.benryan.conversion.PPtDocumentConversionTask.convertFile(PPtDocumentConversionTask.java:56)
at com.benryan.conversion.PPtDocumentConversionTask.convertFile(PPtDocumentConversionTask.java:27)
at com.benryan.conversion.AbstractSlideConversionTask.call(AbstractSlideConversionTask.java:50)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2014-08-21 08:35:50,850 WARN [http-bio-8090-exec-9] [com.benryan.conversion.PPTSlideServlet] doGet Conversion task timed out for attachment : testpowerpoint.pptx with page number 0, waited : 300, now executing in background.