PowerPoint can't be rendered

2014-11-25 09:48:23,869 ERROR [DefaultSlideCacheManager:thread-3] [com.benryan.conversion.AbstractSlideConversionTask] call problem while converting xyz.pptx
 -- url: /plugins/servlet/pptslide | userName: | referer: 
java.lang.RuntimeException: org.apache.poi.openxml4j.exceptions.InvalidOperationException: Can't open the specified file: 'E:\_atlassian\_install\_tomcat\tomcat-7.0.56-confluence\temp\com.benryan.pptx.XMLSlideShow5485982214989563930.tmp'
	at com.benryan.ppt.PptRenderer.getNewXmlSlideShow(PptRenderer.java:56)
	at com.benryan.ppt.PptRenderer.<init>(PptRenderer.java:39)
	at com.benryan.ppt.ImagePPTRenderer.<init>(ImagePPTRenderer.java:24)
	at com.benryan.conversion.PPtDocumentConversionTask.createPptRenderer(PPtDocumentConversionTask.java:89)
	at com.benryan.conversion.PPtDocumentConversionTask.convertFile(PPtDocumentConversionTask.java:49)
	at com.benryan.conversion.PPtDocumentConversionTask.convertFile(PPtDocumentConversionTask.java:27)
	at com.benryan.conversion.AbstractSlideConversionTask.call(AbstractSlideConversionTask.java:50)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.poi.openxml4j.exceptions.InvalidOperationException: Can't open the specified file: 'E:\_atlassian\_install\_tomcat\tomcat-7.0.56-confluence\temp\com.benryan.pptx.XMLSlideShow5485982214989563930.tmp'
	at org.apache.poi.openxml4j.opc.ZipPackage.<init>(ZipPackage.java:102)
	at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:199)
	at com.benryan.pptx.XMLSlideShow.createSlideshow(XMLSlideShow.java:145)
	at com.benryan.ppt.PptRenderer.getNewXmlSlideShow(PptRenderer.java:52)
	... 10 more