Powerpoint conversion failure org.apache.poi.openxml4j.exceptions.InvalidFormatException: Absolute URI forbidden

java.lang.RuntimeException: org.apache.poi.openxml4j.exceptions.InvalidFormatException: Absolute URI forbidden: file:///C:/Documents%20and%20Settings/xxxxxx/Application%20Data/Microsoft/Excel/xxxxxxxxxxxx.xlsb!Sheet2!R3C1:R8C7
        at com.benryan.ppt.PptRenderer.getNewXmlSlideShow(PptRenderer.java:59)
        at com.benryan.ppt.PptRenderer.<init>(PptRenderer.java:42)
        at com.benryan.ppt.ImagePPTRenderer.<init>(ImagePPTRenderer.java:24)
        at com.benryan.conversion.SlideConversionThread.convertFile(SlideConversionThread.java:57)
        at com.benryan.conversion.SlideConversionThread.run(SlideConversionThread.java:123)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
Caused by: org.apache.poi.openxml4j.exceptions.InvalidFormatException: Absolute URI forbidden: file:///C:/Documents%20and%20Settings/xxxxxx/Application%20Data/Microsoft/Excel/xxxxxxxxxxxx.xlsb!Sheet2!R3C1:R8C7
        at org.apache.poi.openxml4j.opc.PackagePartName.throwExceptionIfAbsoluteUri(PackagePartName.java:426)
        at org.apache.poi.openxml4j.opc.PackagePartName.throwExceptionIfInvalidPartUri(PackagePartName.java:175)
        at org.apache.poi.openxml4j.opc.PackagePartName.<init>(PackagePartName.java:83)
        at org.apache.poi.openxml4j.opc.PackagingURIHelper.createPartName(PackagingURIHelper.java:470)
        at com.benryan.pptx.XMLSlideShow.getTargetPart(XMLSlideShow.java:443)
        at com.benryan.pptx.XMLSlideShow.getTargetPart(XMLSlideShow.java:427)
        at com.benryan.pptx.XMLSlideShow.<init>(XMLSlideShow.java:136)
        at com.benryan.pptx.XMLSlideShow.<init>(XMLSlideShow.java:152)
        at com.benryan.ppt.PptRenderer.getNewXmlSlideShow(PptRenderer.java:55)