Issue converting docx from LibreOffice to PDF

[jokinchi]

Hi,

I implemented a functionality to convert docx to pdf. The code:

Code: Select all

       WordprocessingMLPackage pkg = WordprocessingMLPackage.load(inputFile);
       ByteArrayOutputStream baos = new ByteArrayOutputStream(2 * 1024 * 1024);
       
        if (fontManager != null && fontManager.isInitialized()) {
            fontManager.getFonts().forEach(PhysicalFonts::addPhysicalFont);
            PhysicalFonts.discoverPhysicalFonts();
        } else {
            log.warn("FontManager no inicializado, Las fuentes pueden no representarse correctamente");
        }
       
        FontTablePart fontTablePart = pkg.getMainDocumentPart().getFontTablePart();
        if (fontTablePart != null) {
            // Remove embedded font data AND the obfuscated font parts
            pkg.getMainDocumentPart().getRelationshipsPart()
                .removePart(fontTablePart.getPartName());
        }
       
        Mapper fontMapper = new BestMatchingMapper();
        pkg.setFontMapper(fontMapper);   
   
        Docx4J.toPDF(pkg,baos);


Work fine when the docx is from Word, but when is from LibreOffice i obtain this errors:

Code: Select all

2026-07-01T09:27:56.781+02:00 ERROR 26836 --- [appautospres-ms-gestion-documentos] [http-nio-8888-exec-2] [6a44c0fd52f12d2f940dcc3d395120c3-ac57b783f738d3ae] org.docx4j.utils.XmlSerializerUtil       : org.apache.fop.fo.ValidationException: Property ID "__UnoMark__98357_3300398868" (found on "fo:inline") previously used; ID values must be unique within a document! (See position 1:1829)

javax.xml.transform.TransformerException: org.apache.fop.fo.ValidationException: Property ID "__UnoMark__98357_3300398868" (found on "fo:inline") previously used; ID values must be unique within a document! (See position 1:1829)
   at org.docx4j.org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:535) ~[xalan-interpretive-11.0.0.jar:na]
   at org.docx4j.utils.XmlSerializerUtil.serialize(XmlSerializerUtil.java:51) ~[docx4j-core-11.5.12.jar:na]
   at org.docx4j.utils.XmlSerializerUtil.serialize(XmlSerializerUtil.java:18) ~[docx4j-core-11.5.12.jar:na]
   at org.docx4j.convert.out.fo.renderers.FORendererApacheFOP.render(FORendererApacheFOP.java:218) ~[docx4j-export-fo-11.5.12.jar:na]
   at org.docx4j.convert.out.fo.renderers.FORendererApacheFOP.render(FORendererApacheFOP.java:174) ~[docx4j-export-fo-11.5.12.jar:na]
   at org.docx4j.convert.out.fo.AbstractFOExporter.postprocess(AbstractFOExporter.java:168) ~[docx4j-export-fo-11.5.12.jar:na]
   at org.docx4j.convert.out.fo.AbstractFOExporter.postprocess(AbstractFOExporter.java:47) ~[docx4j-export-fo-11.5.12.jar:na]
   at org.docx4j.convert.out.common.AbstractExporter.export(AbstractExporter.java:83) ~[docx4j-core-11.5.12.jar:na]
   at org.docx4j.Docx4J.toFO(Docx4J.java:716) ~[docx4j-core-11.5.12.jar:na]


Any suggestion ?