trouble using FOP to process FO file generated by Xalan or Saxon

Thread: trouble using FOP to process FO file generated by Xalan or Saxon

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trouble using FOP to process FO file generated by Xalan or Saxon
	2007-06-09 19:34:25

I was using xsltproc as my XSLT processor, but it ran out of memory on a large book, so I decided to try Xalan and Saxon to convert a test book. I set up Xalan and Saxon according to the instructions in Bob Stayton217;s book, DocBook XSL: The Definitive Guide (http://www.sagehill.net/docbookxsl/index.html). However, when I try to use FOP 0.93 to convert either of the attached FO files, it reports the following exception: org.xml.sax.SAXParseException: Content is not allowed in prolog. I pasted full output of the exception below. Has anyone else experienced this problem? Please take a look at the attached FO files and tell me what’;s wrong. Regards, Jeff Powanda [Fatal Error] :1:1: Content is not allowed in prolog. Jun 9, 2007 5:21:38 PM org.apache.fop.image.analyser.XMLReader createDocument WARNING: Error while constructing image from XML org.xml.sax.SAXParseException: Content is not allowed in prolog.     at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)     at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)     at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:98)     at org.apache.fop.image.analyser.XMLReader.createDocument(XMLReader.java:115)     at org.apache.fop.image.analyser.XMLReader.loadImage(XMLReader.java:95)     at org.apache.fop.image.analyser.XMLReader.verifySignature(XMLReader.java:65)     at org.apache.fop.image.analyser.ImageReaderFactory.make(ImageReaderFactory.java:85)     at org.apache.fop.image.ImageFactory.loadImage(ImageFactory.java:220)     at org.apache.fop.image.ImageLoader.loadImage(ImageLoader.java:56)     at org.apache.fop.image.ContextImageCache.getImage(ImageFactory.java:432)     at org.apache.fop.image.ImageFactory.getImage(ImageFactory.java:157)     at org.apache.fop.fo.flow.ExternalGraphic.bind(ExternalGraphic.java:68)     at org.apache.fop.fo.FObj.processNode(FObj.java:118)     at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:321)     at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)     at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)     at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)     at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)     at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191) Jun 9, 2007 5:21:38 PM org.apache.fop.image.ImageFactory loadImage SEVERE: Error while recovering image information () : null java.lang.NullPointerException     at org.apache.fop.image.analyser.XMLReader.verifySignature(XMLReader.java:66)     at org.apache.fop.image.analyser.ImageReaderFactory.make(ImageReaderFactory.java:85)     at org.apache.fop.image.ImageFactory.loadImage(ImageFactory.java:220)     at org.apache.fop.image.ImageLoader.loadImage(ImageLoader.java:56)     at org.apache.fop.image.ContextImageCache.getImage(ImageFactory.java:432)     at org.apache.fop.image.ImageFactory.getImage(ImageFactory.java:157)     at org.apache.fop.fo.flow.ExternalGraphic.bind(ExternalGraphic.java:68)     at org.apache.fop.fo.FObj.processNode(FObj.java:118)     at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:321)     at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)     at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)     at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)     at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)     at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191) Jun 9, 2007 5:21:38 PM org.apache.fop.fo.flow.ExternalGraphic bind SEVERE: Image not available: url() Jun 9, 2007 5:21:39 PM org.apache.fop.cli.Main startFOP SEVERE: Exception javax.xml.transform.TransformerException: org.apache.fop.fo.ValidationException: file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234: Error(13/11234): fo:block is not a valid child element of fo:root.     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:168)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191) --------- javax.xml.transform.TransformerException: org.apache.fop.fo.ValidationException: file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234: Error(13/11234): fo:block is not a valid child element of fo:root.     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:501)     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191) Caused by: org.apache.fop.fo.ValidationException: file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234: Error(13/11234): fo:block is not a valid child element of fo:root.     at org.apache.fop.fo.FONode.invalidChildError(FONode.java:393)     at org.apache.fop.fo.FONode.invalidChildError(FONode.java:378)     at org.apache.fop.fo.pagination.Root.validateChildNode(Root.java:127)     at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:303)     at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)     at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)     at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)     at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)     ... 4 more --------- org.apache.fop.fo.ValidationException: file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234: Error(13/11234): fo:block is not a valid child element of fo:root.     at org.apache.fop.fo.FONode.invalidChildError(FONode.java:393)     at org.apache.fop.fo.FONode.invalidChildError(FONode.java:378)     at org.apache.fop.fo.pagination.Root.validateChildNode(Root.java:127)     at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:303)     at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)     at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)     at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)     at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191)


Re: trouble using FOP to process FO file generated by Xalan or Saxon
	2007-06-09 21:36:16

Hi Jeff, The XIncludes in your XML file are not resolving. That leaves your book improperly stuctured, leading to improperly structured FO output.  You should have seen an error message from the stylesheet about not having a template that matches "xi:include". You need to set up either Saxon or Xalan with a recent version of Xerces parser and with the XInclude option turned on. See this section in my book: http://www.sagehill.net/docbookxsl/Xinclude.html#JavaXIncludes Bob Stayton Sagehill Enterprises DocBook Consulting sagehill.net">bobssagehill.net   ; ----- Original Message ----- From: vocera.com href="mailto:jpowandavocera.com">Jeff Powanda To: lists.oasis-open.org href="mailto:docbook-appslists.oasis-open.org">docbook-appslists.oasis-open.org ; xmlgraphics.apache.org href="mailto:fop-usersxmlgraphics.apache.org">fop-usersxmlgraphics.apache.org Sent: Saturday, June 09, 2007 5:34 PM Subject: [docbook-apps] trouble using FOP to process FO file generated by Xalan or Saxon I was using xsltproc as my XSLT processor, but it ran out of memory on a large book, so I decided to try Xalan and Saxon to convert a test book. I set up Xalan and Saxon according to the instructions in Bob Stayton’s book, DocBook XSL: The Definitive Guide (http://www.sagehill.net/docbookxsl/index.html). However, when I try to use FOP 0.93 to convert either of the attached FO files, it reports the following exception: org.xml.sax.SAXParseException: Content is not allowed in prolog. I pasted full output of the exception below. Has anyone else experienced this problem? Please take a look at the attached FO files and tell me what’s wrong. Regards, Jeff Powanda [Fatal Error] :1:1: Content is not allowed in prolog. Jun 9, 2007 5:21:38 PM org.apache.fop.image.analyser.XMLReader createDocument WARNING: Error while constructing image from XML org.xml.sax.SAXParseException: Content is not allowed in prolog.     at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)     at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)     at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:98)     at org.apache.fop.image.analyser.XMLReader.createDocument(XMLReader.java:115)     at org.apache.fop.image.analyser.XMLReader.loadImage(XMLReader.java:95)     at org.apache.fop.image.analyser.XMLReader.verifySignature(XMLReader.java:65)     at org.apache.fop.image.analyser.ImageReaderFactory.make(ImageReaderFactory.java:85)     at org.apache.fop.image.ImageFactory.loadImage(ImageFactory.java:220)     at org.apache.fop.image.ImageLoader.loadImage(ImageLoader.java:56)     at org.apache.fop.image.ContextImageCache.getImage(ImageFactory.java:432)     at org.apache.fop.image.ImageFactory.getImage(ImageFactory.java:157)     at org.apache.fop.fo.flow.ExternalGraphic.bind(ExternalGraphic.java:68)     at org.apache.fop.fo.FObj.processNode(FObj.java:118)     at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:321)     at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)     at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)     at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)     at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)     at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191) Jun 9, 2007 5:21:38 PM org.apache.fop.image.ImageFactory loadImage SEVERE: Error while recovering image information () : null java.lang.NullPointerException     at org.apache.fop.image.analyser.XMLReader.verifySignature(XMLReader.java:66)     at org.apache.fop.image.analyser.ImageReaderFactory.make(ImageReaderFactory.java:85)     at org.apache.fop.image.ImageFactory.loadImage(ImageFactory.java:220)     at org.apache.fop.image.ImageLoader.loadImage(ImageLoader.java:56)     at org.apache.fop.image.ContextImageCache.getImage(ImageFactory.java:432)     at org.apache.fop.image.ImageFactory.getImage(ImageFactory.java:157)     at org.apache.fop.fo.flow.ExternalGraphic.bind(ExternalGraphic.java:68)     at org.apache.fop.fo.FObj.processNode(FObj.java:118)     at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:321)     at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)     at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)     at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)     at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)     at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191) Jun 9, 2007 5:21:38 PM org.apache.fop.fo.flow.ExternalGraphic bind SEVERE: Image not available: url() Jun 9, 2007 5:21:39 PM org.apache.fop.cli.Main startFOP SEVERE: Exception javax.xml.transform.TransformerException: org.apache.fop.fo.ValidationException: file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234: Error(13/11234): fo:block is not a valid child element of fo:root.     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:168)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191) --------- javax.xml.transform.TransformerException: org.apache.fop.fo.ValidationException: file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234: Error(13/11234): fo:block is not a valid child element of fo:root.     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:501)     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191) Caused by: org.apache.fop.fo.ValidationException: file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234: Error(13/11234): fo:block is not a valid child element of fo:root.     at org.apache.fop.fo.FONode.invalidChildError(FONode.java:393)     at org.apache.fop.fo.FONode.invalidChildError(FONode.java:378)     at org.apache.fop.fo.pagination.Root.validateChildNode(Root.java:127)     at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:303)     at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)     at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)     at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)     at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)     ... 4 more --------- org.apache.fop.fo.ValidationException: file:///c:/docs/40SP/xml/other/indextest/IndexTest.fo:13:11234: Error(13/11234): fo:block is not a valid child element of fo:root.     at org.apache.fop.fo.FONode.invalidChildError(FONode.java:393)     at org.apache.fop.fo.FONode.invalidChildError(FONode.java:378)     at org.apache.fop.fo.pagination.Root.validateChildNode(Root.java:127)     at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:303)     at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)     at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)     at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)     at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)     at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)     at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)     at org.apache.fop.cli.Main.startFOP(Main.java:160)     at org.apache.fop.cli.Main.main(Main.java:191) --------------------------------------------------------------------- To unsubscribe, e-mail: docbook-apps-unsubscribelists.oasis-open.org For additional commands, e-mail: docbook-apps-helplists.oasis-open.org
RE: trouble using FOP to process FO file generated by Xalan or Saxon
	2007-06-11 01:13:36

Thanks, Bob! I followed your instructions and can now process my documents with xsltproc, Saxon, or Xalan. I appreciate your help. Regards, Jeff Powanda From: Bob Stayton [mailto:bobssagehill.net] Sent: Saturday, June 09, 2007 7:36 PM To: Jeff Powanda; docbook-appslists.oasis-open.org; fop-usersxmlgraphics.apache.org Subject: Re: [docbook-apps] trouble using FOP to process FO file generated by Xalan or Saxon Hi Jeff, The XIncludes in your XML file are not resolving. That leaves your book improperly stuctured, leading to improperly structured FO output. You should have seen an error message from the stylesheet about not having a template that matches "xi:include";. You need to set up either Saxon or Xalan with a recent version of Xerces parser and with the XInclude option turned on. See this section in my book: http://www.sagehill.net/docbookxsl/Xinclude.html#JavaXIncludes Bob Stayton Sagehill Enterprises DocBook Consulting bobssagehill.net">bobssagehill.net ----- Original Message ----- From: jpowandavocera.com" title="jpowandavocera.com">Jeff Powanda To: docbook-appslists.oasis-open.org" title="docbook-appslists.oasis-open.org">docbook-appslists.oasis-open.org ; fop-usersxmlgraphics.apache.org" title="fop-usersxmlgraphics.apache.org">fop-usersxmlgraphics.apache.org Sent: Saturday, June 09, 2007 5:34 PM Subject: [docbook-apps] trouble using FOP to process FO file generated by Xalan or Saxon I was using xsltproc as my XSLT processor, but it ran out of memory on a large book, so I decided to try Xalan and Saxon to convert a test book. I set up Xalan and Saxon according to the instructions in Bob Stayton’s book, DocBook XSL: The Definitive Guide (http://www.sagehill.net/docbookxsl/index.html). However, when I try to use FOP 0.93 to convert either of the attached FO files, it reports the following exception: org.xml.sax.SAXParseException: Content is not allowed in prolog. I pasted full output of the exception below. Has anyone else experienced this problem? Please take a look at the attached FO files and tell me what’;s wrong. Regards, Jeff Powanda [Fatal Error] :1:1: Content is not allowed in prolog. Jun 9, 2007 5:21:38 PM org.apache.fop.image.analyser.XMLReader createDocument WARNING: Error while constructing image from XML org.xml.sax.SAXParseException: Content is not allowed in prolog.     at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)     at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)     at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:98)     at org.apache.fop.image.analyser.XMLReader.createDocument(XMLReader.java:115)     at org.apache.fop.image.analyser.XMLReader.loadImage(XMLReader.java:95)     at org.apache.fop.image.analyser.XMLReader.verifySignature(XMLReader.java:65)