Hi, I have configured a Data Source for xDB (from EMC, version 10.0.0) and added the following 4 JARs from the xDB lib/ dir, as stated in the oXygen documentation: xhive.jar antlr-runtime.jar icu4j.jar google-collect.jar I created a new connection and I can browse the xDB libaries and open XML documents. If I modify a document and try to save it, I receive an error dialog box saying: "DTD factory class org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from DTDDVFactory." If I enable logging, I get the following: 180070 DEBUG [ AWT-EventQueue-1 ] ro.sync.io.z - setIsCanceled called true 180070 DEBUG [ class ro.sync.exml.editor.m.f ] ro.sync.io.z - hide() 180071 DEBUG [ class ro.sync.exml.editor.m.f ] ro.sync.exml.editor.m.f - java.io.IOException: DTD factory class org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from DTDDVFactory. java.io.IOException: DTD factory class org.apache.xerces.impl.dv.dtd.DTDDVFactoryImpl does not extend from DTDDVFactory. at ro.sync.db.nxd.xhive.XHiveSession$_f.close(Unknown Source) at sun.nio.cs.StreamEncoder.implClose(StreamEncoder.java:301) at sun.nio.cs.StreamEncoder.close(StreamEncoder.java:130) at java.io.OutputStreamWriter.close(OutputStreamWriter.java:216) at java.io.FilterWriter.close(FilterWriter.java:87) at java.io.BufferedWriter.close(BufferedWriter.java:248) at ro.sync.exml.editor.gd.m(Unknown Source) at ro.sync.exml.editor.gd.n(Unknown Source) at ro.sync.exml.editor.ze.saveDocument(Unknown Source) at ro.sync.exml.editor.m.f.chd(Unknown Source) at ro.sync.exml.editor.m.f$1.actionPerformed(Unknown Source) at ro.sync.ui.application.b.q$_b$1.tkh(Unknown Source) at ro.sync.ui.application.q.run(Unknown Source) Do you have any idea of what's wrong? A classpath problem? Regards, -- Florent Georges http://fgeorges.org/