"Expected 'xref' at start of table" when rendering PDF file version 1.4 and later in viewfile macro

2009-09-11 13:59:19,253 ERROR [pool-2-thread-4] [com.benryan.conversion.SlideConversionThread] run problem while converting KG.pdf
 -- url: /plugins/servlet/pptslide | userName: admin
com.sun.pdfview.PDFParseException: Expected 'xref' at start of table
	at com.sun.pdfview.PDFFile.readTrailer(PDFFile.java:964)
	at com.sun.pdfview.PDFFile.parseFile(PDFFile.java:1164)
	at com.sun.pdfview.PDFFile.<init>(PDFFile.java:125)
	at com.sun.pdfview.PDFFile.<init>(PDFFile.java:101)
	at com.benryan.conversion.SlideConversionThread.convertFile(SlideConversionThread.java:79)
	at com.benryan.conversion.SlideConversionThread.run(SlideConversionThread.java:139)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
	at java.util.concurrent.FutureTask.run(FutureTask.java:123)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
	at java.lang.Thread.run(Thread.java:595)